All that good, but does PBP uses them? The main difference I found is the dimension of arrays and long variables.
Say, average, 500 line PBP code will run significantly faster on 18F or not?
I don't care for banks or whatever with 16F - compiler takes care of.
Price is also not an issue - 18F45K80 and 16F1939 (which I most often use) have same price in china - around $3 new, $1 - 2nd hand.