I don’t know if any work brands better than others. I just liberally slather the chamois of my Kiwami Tri Suits the night before with Chamois Butt’r and reapply in the morning. That has worked for me in triathlons up to and including full ironman races for the past 10 or so years. I’ve been exclusively in Kiwami for that time period.
I put Vaseline at the seams, Glide on me (crotch and under arms), and Butt’r on both the chamois and me. Works great.
I have done most of my races in a P1 Ultra and now P1x from Zoot. The P1 Ultra is pretty blown out from like seven (7) 70.3 events. The P1x is not blown out at all from three (3) (all this year). As for the under carriage, I have always used a ton of Body Glide on the Chamois of the suit itself. I also use Zoot shorts for training and do the same thing.
The first 70.3 I ever did in 2023, I used so much body glide, I was confident when swimming I had shit myself. I did not. But, exactly one year later, I almost did, as the poopy monster / turtle head showed up at like mile 6 and there was only one set of porta potties in NC. Ran straight through the finish shoot to the terlets - and its all on video. That’s what I’ve got on tri suits.