I haven't seen Attack the Block, but I do agree with Super totally.
That movie was blissfully insane and it was a shame that it was looked down on by many because it was considered a ripoff of 'Kickass', yet the Creator Mark Millar was actually defending Super's creator James Gunn because both movies were coincidentally made roughly at the same time.
Compared to Kick-Ass, I liked the protagonist of Super better, he didn't vex me as much as that of Kick-Ass.