I think there is a difference per type of snow conditions. I say this only from my last years ride when we were at Rabbit Ears. My buddies 19' AXYS and My 22' Matryx slash. Both 155's. We got roughly 3.5ft of fresh on top of a previous nights 3ft of fresh. The drag of the axys vs the matryx was clear. He really struggled as he would trench and bottom out and also struggle with taking off from a stop. My sled just kept going till it was basically vertical in the fluff. It would dig and pop back up on the snow, where his just wouldn't pop out.
When the sun came out the following day and the snow settled in, he had no troubles and it was hard to see a significant difference at our skill level.