We love AKL and will be having our third stay there in July. We always choose Jambo House. It is the only one of the two with a quick service restaurant. It has a much nicer lobby. Standard rooms have two queens rather than 1 queen and a sleeper sofa. More importantly for us, Jambo House has always been significantly cheaper than staying at Kidani.
A standard room at either resort will not sleep 5. Standard rooms sleep 4 (plus one infant 2 and under). Most of the time you will be able to get two separate rooms at Jambo House (sleeps 8 total) cheaper than you can get a 1 bedroom villa at Kidani (sleeps 5).
Kidani has the better pool and we prefer Sanaa to Boma, but you can easily travel between the two resorts very quickly. They have a shuttle van or you can walk.
The analysis may change if you want to rent DVC points, but you have to compare. In spite of what some people say, renting is not always cheaper than booking through Disney. It depends on the available discounts and the dates you are going. If you were going to rent points, you should compare prices for your dates. I have compared prices for all of our trips and have found that the very small savings renting offers over booking through Disney or Orbitz is not worth the hassle of not having flexibility of being able to cancel at the last minute. I am sure there must be some great ways to save money renting points, but we have not found that to be the case with our dates at AKL.