Load Index 126 = lbs (kg) per tire
Load Index 123 = 3472lbs ( 1578kg) per tire
Speed Rating “R” = 106mph (170kph) 126/123R E
Specs for that size look fine to me, haven't looked in awhile but I think 3750 for 33/16s is on the high side of E rating, which is good. Make sure they're E in the size/rim you want.
I don't see the A/Ts listed anymore, I'd be concerned about shelf age if you even have the option to buy the 1s anywhere... at least you know the A/T² are newer. The SMB is heavy so I prefer not to play around to save a buck, whereas if it were the Jeep or pickup I might look for the A/T to be a bargain and not worry about the age.