I swam in my new T1 for the first time last week. Prior to that, I have owned a QR hydrofull, Aquaman Pulsar, QR hydrojohn, and an Aleeda wetsuit from back in the day. The T1 is also a 'fullsuit' in that it has long arms and legs, but it is two piece, so I am assuming that the difference you speak about is 1 piece vs. 2 piece.
The T1 was the first wetsuit that I have put on, got in the water, and swam 2k without stopping to adjust anything. No zipper to worry about, the crotch does not pull down on your shoulders, nor is there a neck tab or zipper to rub. Getting it off was a little tricky, but I am guessing that the run from the water to the bike will be more than enough time to get the silly thing off. Is it fast? Probably so. I am still getting my swimming back, but it felt at least as fast as the Pulsar that I had.
I'd recommend the T1 without question. Sizing through a dealer or direct from DeSoto is easy. I gave them a few key measurements, my suit arrived from DeSoto a few days later, and it fit like a glove.
Brandon Marsh - Website | @BrandonMarshTX | RokaSports | 1stEndurance | ATC Bikeshop |