Nope, nothing but straight C# code, that's it. Nothing special. The compiler for each device compiles them separately to mach the native/base code of every device. So If you compile/build my game through the Vita IDE it will run on vita, the same if you compile it from the PSP IDE.
I'm going to download the PSP IDE and give it a try.
Also maybe the PS4 one too? Or how about Xbox 360 and Xbox one.
SO MANY OPTIONS!
The cool thing I just found out is that with the Old OLED screen on my vita. The touchscreen still works. This means I can apply it to my old psp screen and hook those up to a raspberry pi, and WALLA!Tac pad!