In a review from January they compared Dell, Acer and Lenovo. While they were technically similar, there were differences in ergonomics. The Lenovo was rated the weakest as it didn't seem to stay on the face when looking down and it leaked light. The Dell was said to be the sturdiest and had the best adjustments.
Later in the summer the same editors reviewed the Samsung HMD Odyssey saying it had the most important issues fixed: Better lenses, wider FOV, better contrast, oled screen, eye width adjustment...
You really can't tell until you've tested how each of them fit your head and eyes.