the peco code 83 are what i consider the top of the line…although I use Atlas code 100 and some shinohara curved turnouts (I had to look at cost since I have way too many turnouts for my own good)…peco turnouts are one of the best out there…Chuck[:D]
In terms of durability and overall great performance, Peco wins hands down. I haven’t seen the code 83 line yet, but the code 100 and 75 (my standard) look slightly British, if that matters to you.
In terms of looks, Micro Engineering’s are the best (but fragile!).
In terms of overall affordability, Atlas wins. And I suspect most modelers use Atlas track, so they can be made to work reliably.