I've been researching rear end setups for weeks now for another build. Plenty of info on all these animals but for a multi use vehicle... driving daily on real roads, going off road in the mud or making sure both wheels are spinning down a quarter mile the detroit trutrac has got to be the best design I have ever seen.
If you are mudding all the time or drag racing all the time then save a freaking ton of money and get a spool. The only way to do it all without slipping or clanking when it snaps shut is a trutrac.
This opinion is from research only but I'm convinced enough that I'm ordering one soon for a ford 8.8 I'm putting in a ranger. Plenty of articles on this setup and anything I've seen negative is very old AND could probably be attributed to shaky installation.