Both are very good movies.
Honestly I can't choose as I find them very different. Shaun is funnier and the characters are so crazy that you end loving them, but I see it more like a parody of the zombie movies than a movie by itself. Zombieland, on the other hand, brings new things and feels more like a movie by itself, but is not as funny.
Please excuse my bad English.
Currently gaming on a PC with an i5-4670k@stock (for now), 16Gb RAM 1600 MHz and a GTX 1070
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