Ive been running SnoStuds 6" Magnum series for a few years on all my sleds. 09 TNT 500SS, 10 600 Etec Renegade, 16 TNT 600 Etec , In my experience Snostuds hold up better than Woody's. I have not had Shaper Bars for quite a few years but those worked well for me.
A couple of times a year Snostuds offers 30% off and free shipping so the prices cant be beat if you order during the sales. Might be worth a call to them.
FWIW Woodys makes wear rods of skidoo. It even says woodys on the box from the Skidoo wear rods for the Pilot TS skis.