Rep Fitness basic iron: +/- 3% accuracy
Rogue basic, Troy Premium, Rep Equalizer: +/-2%
Rogue Machined: +2/-0%
Rogue 6 shooter: +/- 1%
Rogue calibrated, Vulcan calibrated: +/- 10g
Check shipping to determine best value in price. What part of the country you live in can affect which is best after shipping charge. Also Vulcan calibrated is free shipping if bought as a set.