MDC Ultimate vs Comfort Stirrups

I have the MDC Ultimates and am starting to think (after all these years of owning them) that I might want the Comfort ones instead. Anyone else have a preference? Why?

I have the comfort ones. Would not want mine to rock like the ultimates.

MDC Comfort stirrups with Super Comfort Pads.
I don’t like wiggling around and they’re easier on my knees and ankles.

I have the MDC S Classics - LOVE them. I wasn’t a huge fan of the Ultimates (I don’t like the flexible stirrups).

The ultimates saved my aged knees …greatly reduced pain for me.

I have both and definitely prefer the Comfort. I picked up the Ultimates on eBay, but I’m considering reselling them to buy another pair of Comforts. I prefer the stability with no flex.

Thanks!