Has to do with RG also, IQ Tour, very low RG, so it's already going to roll early and smooth, add surface, earlier and smoother, remove surface and add shape. Rocket Ship, higher RG, surface balances out the length, as it shines, gets longer and stronger, perhaps too long. Surface yes, also RG in addition.
What's odd to me, is that as my IQ Tour lane shined, it seem to get better for me. As the Rocket Ship with the same cover lane shined for me, it got worse. I'm guessing its maybe due to the starting surface of the balls.