douglaz/comparison.md

## comparison.md

      
    Raw
  

              comparison.md
            
          
Dimension
RGB
Taproot Assets (TA)
Spark (statechains L2)
Liquid (sidechain)


Security / trust
Client-side validation; no third-party trust for correctness. (RGB Docs)
Client-side proofs; Universe servers help discovery/backup (not correctness). (Builder's Guide to the LND Galaxy)
“Moment-in-time” 1/n operator trust at transfer; unilateral exits mitigate. (Spark)
Strong Federation with functionaries; two-way peg. (The Liquid Network)


Validation / commitments
Off-chain consignments; commitments hidden via Tapret in Taproot. (RGB Docs)
Taproot commitments + off-chain proofs; tapd/tapcli stack. (Lightning Engineering)
Shared-signing over UTXOs with decrementing timelocks; pre-signed exits. (Spark)
Separate Elements chain; peg-in/out to Bitcoin. (The Liquid Network)


Lightning integration
Emerging (RGB-over-Lightning workstreams).
Shipping: TA-over-Lightning since Jul 23, 2024; ongoing v0.6 (2025). (Lightning Engineering)
Interop via service providers (LN payments supported). (Spark)
Parallel to LN; many wallets/exchanges support Liquid directly. (The Liquid Network)


Privacy
Very strong: only counterparties hold state; Tapret hides data. (black-paper.rgb.tech)
Good defaults; Universes you opt into can reveal some metadata. (Builder's Guide to the LND Galaxy)
Operators see transfers they co-sign; no CT. (Spark)
Confidential Transactions hide amounts/assets. (The Liquid Network)


Data availability / backups
You must keep stash/consignments (lose proofs ⇒ lose asset). (RGB Docs)
Proofs can be re-served by Universe servers. (Builder's Guide to the LND Galaxy)
Watch logic + operator liveness; unilateral exit if needed. (Spark)
Standard sidechain node/wallet backups; federation infra. (The Liquid Network)


Throughput / fees / UX
Off-chain state; LN transport still maturing.
LN-grade throughput/fees; familiar lnd/LiT operations. (Lightning Engineering)
Instant, near-zero fee on L2; on-chain cost only for exits. (Spark)
~1-min blocks; low fees; fast federation finality. (The Liquid Network)


Programmability / smart contracts
Contract logic via RGB/AluVM (client-side). (GitHub)
Asset-focused protocol (issuance/transfer/audit), not a general VM. (Lightning Engineering)
Token/API layer (BTKN), not an on-chain VM. (Spark)
Simplicity smart contracts are live on Liquid mainnet (Jul 31, 2025); tooling (SimplicityHL, compiler, web IDE). (Blockstream)


USDT availability (today)
Announced (Aug 28, 2025) to launch USD₮ on RGB; not yet publicly live for users. (Tether)
Announced (Jan 30, 2025) to bring USD₮ via TA; wallets largely use wrapped USDT until Tether issues (e.g., Joltz statement). (Tether)
No Tether-issued USDT announced/live on Spark. (Spark docs show token support, but Tether newsroom lists no Spark issuance.) (Spark)
Live for years; Tether lists Liquid among supported protocols; Bitfinex documents USD₮ on Liquid. (Tether)
Dimension	RGB	Taproot Assets (TA)	Spark (statechains L2)	Liquid (sidechain)
Security / trust	Client-side validation; no third-party trust for correctness. (RGB Docs)	Client-side proofs; Universe servers help discovery/backup (not correctness). (Builder's Guide to the LND Galaxy)	“Moment-in-time” 1/n operator trust at transfer; unilateral exits mitigate. (Spark)	Strong Federation with functionaries; two-way peg. (The Liquid Network)
Validation / commitments	Off-chain consignments; commitments hidden via Tapret in Taproot. (RGB Docs)	Taproot commitments + off-chain proofs; `tapd`/`tapcli` stack. (Lightning Engineering)	Shared-signing over UTXOs with decrementing timelocks; pre-signed exits. (Spark)	Separate Elements chain; peg-in/out to Bitcoin. (The Liquid Network)
Lightning integration	Emerging (RGB-over-Lightning workstreams).	Shipping: TA-over-Lightning since Jul 23, 2024; ongoing v0.6 (2025). (Lightning Engineering)	Interop via service providers (LN payments supported). (Spark)	Parallel to LN; many wallets/exchanges support Liquid directly. (The Liquid Network)
Privacy	Very strong: only counterparties hold state; Tapret hides data. (black-paper.rgb.tech)	Good defaults; Universes you opt into can reveal some metadata. (Builder's Guide to the LND Galaxy)	Operators see transfers they co-sign; no CT. (Spark)	Confidential Transactions hide amounts/assets. (The Liquid Network)
Data availability / backups	You must keep stash/consignments (lose proofs ⇒ lose asset). (RGB Docs)	Proofs can be re-served by Universe servers. (Builder's Guide to the LND Galaxy)	Watch logic + operator liveness; unilateral exit if needed. (Spark)	Standard sidechain node/wallet backups; federation infra. (The Liquid Network)
Throughput / fees / UX	Off-chain state; LN transport still maturing.	LN-grade throughput/fees; familiar `lnd`/LiT operations. (Lightning Engineering)	Instant, near-zero fee on L2; on-chain cost only for exits. (Spark)	~1-min blocks; low fees; fast federation finality. (The Liquid Network)
Programmability / smart contracts	Contract logic via RGB/AluVM (client-side). (GitHub)	Asset-focused protocol (issuance/transfer/audit), not a general VM. (Lightning Engineering)	Token/API layer (BTKN), not an on-chain VM. (Spark)	Simplicity smart contracts are live on Liquid mainnet (Jul 31, 2025); tooling (SimplicityHL, compiler, web IDE). (Blockstream)
USDT availability (today)	Announced (Aug 28, 2025) to launch USD₮ on RGB; not yet publicly live for users. (Tether)	Announced (Jan 30, 2025) to bring USD₮ via TA; wallets largely use wrapped USDT until Tether issues (e.g., Joltz statement). (Tether)	No Tether-issued USDT announced/live on Spark. (Spark docs show token support, but Tether newsroom lists no Spark issuance.) (Spark)	Live for years; Tether lists Liquid among supported protocols; Bitfinex documents USD₮ on Liquid. (Tether)
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