I dont think this is a good title. Ktor is a web framework while Sping is a full app framework.

And this is ok, I like ktor as is. Lightweight, fast, easy to use. Spring has it's place ofcz as Ktor also has. But they purpose is different though there are some common part of them.

Also SB has coRouter fn, not as sofisticated as Ktor's solution, butstill good.