In the pictures of the Strata Prime that have been posted, I see that its rack has additional crossbars on the sides of the rack.
I have not read about any complaints of the Strike Pro SE rack being unstable or wobbly such that additional crossbars would be needed. I am wondering why Alesis has added the 2 crossbars to the Strata Prime rack.
Update 4/14/24
After receiving my Strike Pro SE kit, I set up the rack and installed the toms and cymbals on the rack. I noticed that the weight of the 12 and 14 low toms caused the crossbar and post on that side of the rack to lean and was a bit wobbly. I found a curved rack tube and 2 clamps on Reverb.com. I installed this second tube on that side of the rack. It is now rock solid. Now I understand why Alesis added the second crossbars on the sides of the Strata Prime rack.