Is "The Watch" a rip-off?

I was just thinking about seeing Ben Stiller's new comedy The Watch (originally titled Neighborhood Watch), a ruanchy comedy involving an alien invasion on a small neighborood, where there local neighborhood watch steps in to protect the suburban citizens. But then I realized, it's sort of a rip-off of a much better British film from last year. Attack the Block focused on inner-city punks defending their aprtment complex and surrounding neighborhood from nasty alien creatures who crash-landed on Earth. Its full of good characters, clever writing, funny jokes, extreme violence and gore, and good special effects. I realized that this new American film is somewhat of a rip-off. They replace the subtle, witty British humor with the usual, over-the-top sex and gross-out humor, and replace unknown actors with popular comedians. (Jonah Hill, Ben Stiller, Vince Vaughn)  But they keep the aliens (who aren't nearly as celverly designed as in the other film), the gore, and the over-all tone of the film: a funny, big, gory blockbuster comedy. Unfortunately, I don't think the hyped-up The Watch will live up to the standards of the lesser-known, but far superior Attack the Block.