wetsuit stitching?

I'm looking to buy a wetsuit, and I called around my area asking about appropriate size for the winter. I was told a good quality 3/2 full suit with good wetsuit stitching would be suitable, as opposed to a full 4/3. He was mentioning something about something better than blind stitching, and liquid tape? I couldn't find any proper posts about stitching and the various differences it has on a suit.