SSB Question for Pemdas

Pemdas,

Question - I got access to a SSB for the first time tonight, know you have been using one for a while. I worked up to a full ROM triple with 370. My best back squat triple is 465, so 95 pound delta. What is your experience with the delta? My lower back is on fire, and I noticed this hit my quads harder than a regular back squat, but my shoulders are happy :). Thanks for sharing, hoping to learn about my weaknesses.

I got 545x4 back squat and 405x4 ssb squat, the ssb squats were after the 545 tho so take that for what its worth.