I did a comparison with my buddy's HW2.5 P3D+ to my HW3 P3D+. His backup camera is much smoother (really noticeable when driving down the road with it on). I've complained about this since day 1 of ownership, but seems Tesla doesn't seem to care to fix it, which is a shame. Conversely, the lag when parking and seeing the lines appear around the car is much reduced on HW3 compared to HW2.5, which is nice.
Other than that (that I've noticed), nope.