Kotlin coroutine spring boot MVC - Controller vs DSL

Controller.kt

@RestController
class Controller(val service: SomeService) {
    @GetMapping("/something")
    fun all() = service.all()

    @PostMapping("/something")
    suspend fun save(@RequestBody something: CreateDTO) = service.create(something)

    @PutMapping("/something/{id}")
    suspend fun update(@PathVariable id: Long, @RequestBody updates: UpdateDTO) = service.update(id, updates)
}

RouterConfiguration.kt

@Configuration
class RouterConfiguration {
    @Bean
    fun routes(handler: SomethingHandler) = coRouter {
        "/something".nest {
            GET("", handler::all)
            POST("", handler::create)
            PUT("/{id}", handler::update)
        }
    }
}

SomethingHandler.kt

@Component
class SomethingHandler(private val service : SomethingService) {
    suspend fun all(req: ServerRequest) = ok().bodyAndAwait(this.service.all())

    suspend fun create(req: ServerRequest): ServerResponse {
        val body = req.awaitBody<CreateDTO>()

        val something = this.service.create(body)

        return created(URI.create("/somehting/${something.id}")).buildAndAwait()
    }

    suspend fun update(req: ServerRequest): ServerResponse {
        val body = req.awaitBody<UpdateDTO>()

        val something = service.update(req.pathVariable("id").toLong(), body)

        return when {
            something != null -> {
                noContent().buildAndAwait()
            }
            else -> notFound().buildAndAwait()
        }
    }
}