Don't know where you got the idea that Vans are stiffer, they're both the same structurally, just different internals.
Float bump sensitivity is ever so slightly worse than the Vans, but tbh you'll be very hard pressed to notice the difference. Tracking – see stiffness, same on the Float and the Van.
For me the lighter weight of the Float was a minor bonus, the adjustability was quite a big plus though – easy sag setup, and a 30 minute job to adjust the travel if you feel so inclined (or want to swap the forks across bikes).
I think the most telling thing is that Dirt – traditionally focused on DH, DJ, 4X kit – recommend the Floats over the Vans, despite the commonly-held belief that coil is better than air for that sort of application.