As much as you’d like to think that $700 wetsuit will cut 10 seconds off your 100 pace, I can’t say that I’ve seen that level of improvement.
That’s because you haven’t looked very hard. There have been a number of threads here that verified that even the best triathlon swimmers (including those who swam in college, but excluding John Kenny 
gain on the order of :08-:10/100yds with a quality wetsuit that fits. My personal experience in August was doing 2x200scy on 3:00 on a Monday without a wetsuit, holding 2:28; Wednesday with my brand new wetsuit (first time in the water with it) I repeated that holding 2:09 and 2:10.
And it was only $400, including shipping.