from my experience platform matters. on bb Worldmate - much cleaner interface, on android tripit as there is no WM pro on droid so no embedded alternate flight search which tripit pro has(although I wish tripit would make the default alt flight search all day - for some reason they think the only alt flight I would be interested in is later than scheduled - in fact, most of the time I am looking to move earlier as my reservations tend to have "safety time" built in).

tripit server side on all platforms better on auto import and also publishing iCal feed (great for gmail trip calendar). one thing that drove me batty with TripIt was it's insane desire to add gazillions of entries to the schedule (map to hotel, check out times - which it makes up...) Someone on FT mentioned how to turn it off and that makes it much better - my preference is just transportation and housing on the agenda for travel. keep it clean so I don't have to hunt for what I want.

Right now I have both on my Droid Incredible but TripIt is my go to.