The ONLY ones that work are when you have one hand over and one hand under (grip). Oh, and use the narrow grip.... Is that what kind of answer you wanted? The truth is you have to do them all if you want all the muscles stimulated.
Personally, id go for wide-overhand grip.....works the lats brilliantly. A closer underhand grip works more of the biceps and only a smaller radius of the back........so it really depends on what you want from chins!