I've said this to others and I will say it to you. A stick and a hitbox are very expensive and if you play competetively and at offline tourneys, please be sure to buy a dual modded one first and not one propietary to only one platform, the game has been running mostly on 360s lately, unless of course you already play on 360 you should be good for nearly any FG except MK9. As far is it better or is it worse, well I thought the same, that a stick would make me a better player, I forked out 100 buscks on a Madcat and then got screwed becsause the change to 360 as a standard, but I also for a while swore by them and felt that there was no going back and lately found on any FG I am just better with a pad. Its all in preference and doesn't really matter what controller you use, hell use a Guitar Hero controller if it works, but you need to try it for yourself first, its too much money to fork out and then turns out you hate using it.
Just keep in mind dual modded is the best bet, it ain't cheap, but you will thank me later for forewarning you. I went back to pad I feel more confident and comfortable with it. Just if you do stay pad consider buuying a controller that is exactly the same on both systems, such as the Madcat pads, both resemble the same way and they are not that expensive to get now. You want something reliable and comfortable. If your using a genaric PS3 pad, life is gonna suck using a converter, they tend cause wonky issues even with sticks and they can make playing like playing a laggy online match.