Haxchi CFW is very simple. Launch and you have sig patches. Only for sysnand. Recommended for most. Pretty much required for cbhc without rednand
Mocha CFW is a cfw with a few more options. It's generally only recommended for rednand. (rednand isn't recommended atm unless you want extra safety)
So basically I recommend haxchi cfw for simpleness and Mocha for rednand (aka extra safety)