When comparing SpriteKit vs UDK, the Slant community recommends SpriteKit for most people. In the question“What are the best 2D game engines?” SpriteKit is ranked 41st while UDK is ranked 73rd. The most important reason people chose SpriteKit is:
Easy to access in Xcode.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Built-in in Xcode
Easy to access in Xcode.
Pro Awesome performance
One of the most efficient frameworks. If you need to build an iOS game, this is the best solutions.
Pro Large toolset
UDK has an extremely large toolset that allows creating almost anything without having to use a 3rd party tool or plugin.
Pro Triple A track record
UDK is an engine used by many big name companies for popular games such as the Gears of War series.
Cons
Con Restricted in apple ecosystem
This is an Apple technology and its use is restricted to iOS and OSX systems.
Con Superseded by Unreal Engine 4
Con DevKit only runs on Windows
Even though UDK can deploy games to run on multiple platforms, including Mac, it does not feature support for development on Mac.
Con Limits games to FPS
UDK was originally developed for the FPS, "Unreal Tournament", and it certainly shows. While UDK is a very powerful engine, it takes quite a bit of work to make it do something other than an FPS.
