Rip Curl Flash Bomb 6/5/4 vs. O'Neill Pyscho RG8 5.5/4 - New York

What would people suggest between these suits for NY winters. My last winter suit just crapped out (zipper broke on a o'neil mutant), but it was time to upgrade anyways...

I am a big guy anyways at 6'2" and about 195 lbs and big shouldered. How are the sizing on O'neil vs. Rip Curl suits (I only have my mutant size (LT) to compare with)?