I found this question on another site, but this voting box will still effect the vote on that other site..
The results may or may not surprise you.
Twilight is an action-packed modern-day love story between a teenage girl named Bella Swan and Edward Cullen, a vampire. Twilight is not your usual high-school romance series. Edward and Bella's passionate love for each other leads to a constant struggle to keep Bella alive and unharmed.
Harry Potter is a series of adventures of a young wizard named Harry Potter and his two wizard friends Ron Weasley and Hermione Granger. The story is based upon Harry's struggle against an evil wizard Lord Voldermort who killed Harry's parents to conquer their world.
I hate 'Twilight' and 'Harry Potter' is awesome but if you want something more adult that also has vampires, witches, and shapeshifters then you should watch 'Night Watch' and it's sequel 'Day Watch'. Two awesome Russian films from the director of 'Wanted'.
I will be and always will be a Harry Potter fan. I might watch the Twilight movie but I will never pick up the book because I think its tweeny bop romance novel that got a lot of uneccesary hype. HP has more substance in both books and films than Twilight does.
The question is which is hotter, right? Not which is better?
In that case I think I'd have to say Twilight by default simply because it's a love story. As amateur as the story seems (I've only seen part of the film and not read the books), Twilight is about sexual tension, whereas Harry Potter is about good versus evil.
The characters' sexual identities in HP is treated as an afterthought, distracting them from the main conflict. Sometimes it gives them strength, others it makes them vulnerable.
Twilight, on the other hand, is a teen harlequin novel. It uses vampirism as a metaphor for sexual obsession, which to at least one hilariously suggestive scene ("You need to suck the vampire poison out of Bella!"). The only reason anyone has even heard of Twilight is because it's hot.
Which is better? Harry Potter, hands down. Asking which is hotter is like asking if Lord Of The Rings is hotter than Brokeback Mountain. Brokeback might not do much for me, but its situations can at least be hot to others. I find it weird to imagine someone getting off on LOTR. (Fanfiction and pausing on Arwen or Galadriel doesn't count.)