It looks to me like when on the SSB your decent is generally slower. The faster decent = better rebound with the wraps which would make sense if you were seeing much higher with the straight bar.
It does appear you might be pulling down on the handles which in my experience make it easier to grind out weights on the SSB.
So while you might be seeing 95% it could just be because you're better able to grind through a sticking point than you could with a straight bar. I feel like your elbow position is a bit chicken winged which would make my tend to think you're able to grind out better with the SSB.
Either way if YOU personally can determine what works for you with the SSB > straight bar then go off that.
My spider bar raw max based on my last training cycle was my wrapped max as well. I'll try it out next training cycle and see if it holds true.