correction...Longfield is STRONGER than the Newfield. I busted up a handful of Newfields and now run Longfields. Better price too, and the guy now heat treats inner axles to add more strength in the system.
Newfields are the ticket if you run a LOT with the hubs locked since their harder casting will have more durability than the softer Longfield. (ie, you have a 60-62 series and it's a dailt driver and you keep the hubs locked in for those occasional slippery snowy days...)
If you run extreme trails tho, the Longfield is the ticket.