I’d switched to Blazers a few years ago when I was still using a Whisker Biscuit rest – they produced far less drag going through the whiskers. This was demonstrated to me by loading an arrow (but not knocking it on the string), turning the bow so the arrow was facing the ground and releasing it through the rest. Gravity alone “shot” the arrow through the rest. With conventional 4″ plastic vanes, the arrow would not make it through the whiskers. With Blazers, the arrow fell all the way through the whiskers.
Then I switched to a drop-away rest and was having clearance issues with the higher profiled Blazers, so I went back to vanes.