oldtrainerguy28: If you are comparing older produced LS2 steel (steel produced approx. 24-months or older) than yes you might feel a difference. We made a running change about 24 months ago to use identical grade of steel and same finishing between LS2 and LS3. As is the case with any running changes, it takes time for old inventory to flush through the channels but the change occurred on 2014 Supreme and was a rolling change on 2013 Vapor prior hence why you might see some mixed inventory currently. After market was changed at the same time and again, you might see mixed inventory in the market as it flushes through the channel. Hopefully this info helps. If not, let me know