I have two X-vests and I like them a lot. But...I prefer the design of the resistance wear vest. So to me, the answer to your question is YES.
The X-vest is designed to restrict breathing during exercise, resistance wear is designed not to. I just feel that the resistance wear people have come up with a great concept and executed it well.
ILVQLOS Above is my training partner. His endorsement is a good one. Former Airborne, SWAT certified, ISR certified, SPEAR certified, CrossFit certified, also Combatives with Kni-COM, Crucible, Cestari, Hockheim, and of course the good old Airborne Rangers.
He runs up the steps of a bank building with his vest.
Also the ramps of a parking garage.
He bought one vest, then returned it and bought a V-Max.