Anyone use triathlon shorts instead of cycling shorts?

Ok, so here's my problem.

I own quite a few padded shorts, ranging from $30 - $250 (bibs), and they feel great for the first 2-3 hours, then I get really uncomfortable in them. Not pain, but quite uncomfortable.

I was able to ride 200km wearing only compression shorts with no padding, but I think I got lucky.

Regular shorts/underwear always have issues because of the seams, so they aren't viable.

I heard that triathlon shorts are lightly padded, so they may offer a nice in-between.

Does anyone wear them? How do they compare to traditional cycling shorts?