GW2 API v1 vs v2 for Item Details

12138.v1.js

// https://api.guildwars2.com/v1/item_details.json?item_id=12138
{
    "item_id": "12138",
    "name": "Stick of Butter",
    "description": "Ingredient",
    "type": "CraftingMaterial",
    "level": "0",
    "rarity": "Basic",
    "vendor_value": "1",
    "icon_file_id": "63248",
    "icon_file_signature": "CA45CEE2BA3BA040E7C294965CA3756FC3F33FD1",
    "game_types": [
        "Activity",
        "Dungeon",
        "Pve",
        "Wvw"
    ],
    "flags": [ ],
    "restrictions": [ ]
}

12138.v2.js

// https://api.guildwars2.com/v2/items/12138
{
    "name": "Stick of Butter",
    "description": "Ingredient",
    "type": "CraftingMaterial",
    "level": 0,
    "rarity": "Basic",
    "vendor_value": 1,
    "game_types": [
        "Activity",
        "Dungeon",
        "Pve",
        "Wvw"
    ],
    "flags": [ ],
    "restrictions": [ ],
    "id": 12138,
    "icon": "https://render.guildwars2.com/file/CA45CEE2BA3BA040E7C294965CA3756FC3F33FD1/63248.png"
}

49412.v1.js

// https://api.guildwars2.com/v1/item_details.json?item_id=49412

{
    "item_id": "49412",
    "name": "Lunaria, Circle of the Moon (Infused)",
    "description": "",
    "type": "Trinket",
    "level": "80",
    "rarity": "Ascended",
    "vendor_value": "495",
    "icon_file_id": "511819",
    "icon_file_signature": "EFF8434DFE2B67026FA202091FD1F6ED2653E4A9",
    "game_types": [
        "Activity",
        "Dungeon",
        "Pve",
        "Wvw"
    ],
    "flags": [
        "AccountBound",
        "HideSuffix",
        "NoSalvage",
        "NotUpgradeable",
        "AccountBindOnUse",
        "Unique"
    ],
    "restrictions": [ ],
    "trinket": {
        "type": "Ring",
        "infusion_slots": [
            {
                "flags": [
                    "Defense"
                ]
            },
            {
                "flags": [ ]
            }
        ],
        "infix_upgrade": {
            "buff": {
                "skill_id": "15751",
                "description": "+13 Condition Damage\n+13 Precision\n+13 Toughness\n+13 Power\n+13 Vitality\n+13 Healing Power\n+13 Ferocity\n+5 Agony Resistance"
            },
            "attributes": [
                {
                    "attribute": "Power",
                    "modifier": "33"
                },
                {
                    "attribute": "Precision",
                    "modifier": "33"
                },
                {
                    "attribute": "Toughness",
                    "modifier": "33"
                },
                {
                    "attribute": "Vitality",
                    "modifier": "33"
                },
                {
                    "attribute": "Healing",
                    "modifier": "33"
                },
                {
                    "attribute": "ConditionDamage",
                    "modifier": "33"
                },
                {
                    "attribute": "CritDamage",
                    "modifier": "33"
                }
            ]
        },
        "suffix_item_id": "",
        "secondary_suffix_item_id": ""
    }
}

49412.v2.js

// https://api.guildwars2.com/v2/items/49412

{
    "name": "Lunaria, Circle of the Moon (Infused)",
    "description": "",
    "type": "Trinket",
    "level": 80,
    "rarity": "Ascended",
    "vendor_value": 495,
    "game_types": [
        "Activity",
        "Dungeon",
        "Pve",
        "Wvw"
    ],
    "flags": [
        "AccountBound",
        "HideSuffix",
        "NoSalvage",
        "NotUpgradeable",
        "AccountBindOnUse",
        "Unique"
    ],
    "restrictions": [ ],
    "id": 49412,
    "icon": "https://render.guildwars2.com/file/EFF8434DFE2B67026FA202091FD1F6ED2653E4A9/511819.png",
    "details": {
        "type": "Ring",
        "infusion_slots": [
            {
                "flags": [
                    "Defense"
                ]
            },
            {
                "flags": [ ]
            }
        ],
        "infix_upgrade": {
            "buff": {
                "skill_id": 15751,
                "description": "+13 Condition Damage\n+13 Precision\n+13 Toughness\n+13 Power\n+13 Vitality\n+13 Healing Power\n+13 Ferocity\n+5 Agony Resistance"
            },
            "attributes": [
                {
                    "attribute": "Power",
                    "modifier": 33
                },
                {
                    "attribute": "Precision",
                    "modifier": 33
                },
                {
                    "attribute": "Toughness",
                    "modifier": 33
                },
                {
                    "attribute": "Vitality",
                    "modifier": 33
                },
                {
                    "attribute": "Healing",
                    "modifier": 33
                },
                {
                    "attribute": "ConditionDamage",
                    "modifier": 33
                },
                {
                    "attribute": "CritDamage",
                    "modifier": 33
                }
            ]
        },
        "secondary_suffix_item_id": ""
    }
}