Stay with the AT 81 , l can tell by the tread pattern on the new 82 rear, that it will never beat the traction over all different terrain that the 81 has. The 82 is also a harder compound, so it will wear out faster on hard terrain. I ride Southern California Desert with many conditions. I have tried more than a dozen tires and the AT 81 is the overall winner. It works everywhere when new and only loses in deep sand after it wears down.
I would 100% agree with you except for the fact I’ve now ridden the at82 also living in SoCal also riding varying train and I gotta say this tire other than my slight gripe with lateral traction is out performing an AT81! It’s definitely worth a try. My next ride that I haven’t posted yet I can 100% attest that this now worn tire outperformes an 81 on Sandy Hill climbs.
I’m not familiar or I should say I haven’t owned an MX 34, but MX motocross AT is all terrain I guess. I would believe it would wear better but it depends on what you’re doing. It’s set up for a soft intermediate terrain. Soft terrain, scoop side forward, intermediate to hard terrain flat blade forward. If you’re doing trail riding, it’s worth a try. The AT81/AT82 tires have been loved by GNCC racers. More so the rear tire than the front.