Coming from a single motor S to a dual motor X I can tell a huge difference in regen, the X is much stronger, I love it. I suspect this is due to the dual motor because I felt the same thing with a dual motor loaner S.
I was super worried about moving from the S to the X, I obsessed over it for months. I really loved my S and couldn't imagine loving another vehicle as much. I was worried the X wouldn't drive the same, would feel cumbersome and not nimble, I was worried it was too ugly (the pictures on the order page aren't the most flattering, IMHO), I was worried it wouldn't have enough storage space, I was worried I was going to miss things about my S like the sunroof.
In the end, I love the X even more than the S! It's noticeably faster than my S was and I actually prefer the slightly more cushioned feeling of the X on standard height, when put it on the low settings it feels more like my S used to. I don't think it's ugly in person, though the S is still a better looking vehicle. I will say this, the X definitely draws a bigger crowd than my S when those FW doors open
I absolutely love the windshield and would take it any day over a sunroof I only occasionally used. All in all I'm very happy I made the switch, though occasionally a tear still collects in the side of my eye when I think about my old S