"it's just an attempt at doing TRR with a splash of cashing in on a comic book"
Except the two films were in production simultaneously. In fact, the director of The Raid is on record as saying that he saw the script for Dredd during filming his own movie and immediately thought that he'd have to get his own movie out first to avoid being on the other end of the comparison.
As for "cashing in on a comic book", Dredd doesn't have the brand recognition to make any kind of cash-in work. With the exception of Batman, Superman and Spider-Man virtually no comic character does.