I'd say better QA on cases-Tt has the dubious distinction of being the only case manufacturer to cause me to need stitches not once but eight times. The most was 18. Other cases have done it too-CM, Apevia, Raidmax-but Tt is the only one I KNOW I'm gonna get cut on.

Had a Tt Shark, nice case. Wish it had come pre-polished. That took forever.