my two bikes are a schwinn OCC and a generic mountain bike they have the stock banana seat and a wal-mart comfort saddle respectively.
the mega wide comfort saddle from walmart is awesome very squishy and plenty of room for my bony-oney-butt. that said the bike is not motorized and has dual suspension.
the schwinn OCC banaa seat is really odd to me, when stationary i would rate it as the most comfortable bike seat I have ever sat on, but when moving the fact that it is a hardtail bike with solid front forks and nothing whatsoever to insulate your butt from the road starts to become more of an issue.
most bike banana seats are pretty narrow, the OCC one is rather wide (not quite as wide as say a Honda CB) I would assume the narrower ones are less comfortable, but like any seat this can be mitigated with more padding.
as for the future my plan is to do nothing with the pedal bike, and eventuallly I am going to build a sprung saddle onto my OCC that is more like a hybrid of the old Honda CB seats and the kind you would see on a tractor.