Key De Mount Blade Is There Much Difference Btween 76 And 88 Key Keyboard?

Is there much difference btween 76 and 88 key keyboard? - key de mount blade

Buy IM planning, a keyboard, but you can buy it confused .......
If I buy one .... 76 ib key'd be able to play songs like "Moonlight", "key'd One In A Million", "Hallelujah (Shrek), etc. in 76 ??????
thax in ....................!!!!!!!!!!!! btw wch forward 1 Brothers to the Rescue is the whole?