How far... imho too far. Kidani was fun with our large group and we did love the pool/bar/villas etc. but we lucked out with the villa locations.. some are soooo far. And it feels rather removed from everything. Really removed! Even the bus rides "felt" pretty long..
We ve stayed both, prefer Jambo for location... feels like ur less removed, nothing prettier than Jambo main area, the entire lobby area is breathtaking. The amenities were better. We ve done both villas (5th floor at Jambo) and regular rooms and despite what can be a long walk within resort depending on savannah/room location... ( last visit another free UPgrade, so we ve lucked out that way) it just feels more Disney immersed... if that makes sense at all. Just a feeling I get when there.
Wherever you end up, enjoy!