i wrote up my post then i realized that there might still be people in the world that don't know the ending of HP or the twilight series, so be aware there are spoilers in my post. yeah.
i like harry potter better than twilight because j.k. rowling didn't give up on her climactic battle scenes and she wasn't afraid to kill off her characters when characters needed killing. who died in HP? harry's parents, sirius, dumbledore, moody, hedwig, lupin and tonks (yes? been a while since i read them), and more that i know i'm missing. in twilight? um.... harry clearwater? irina... but nobody liked her anyway.
HP:OotP, huge fight in the department of mysteries, sirius dies. in eclipse, meyer takes the main characters away from the main fight and we read about it through edward's translation of seth's thoughts while bella whines about shit, shit gets real for maybe 5 pages and jacob gets injured but of course his superwolf powers save him. lame. the final battle in HP:DH was epic compared to the oh, she's not a dangerous baby after all, i guess we'll mind stab at you for a while until we realize that bella is supernewvampire then we'll give up and go home and give you everything you've always dreamed of. what the hell. harry potter's life was hard. he had bad guys after him all the damn time. bella had bad guys after her and all that happened to her was her leg got smashed and she became immortal.
seriously. there is no comparison to be made between HP and twilight.