The lenses is what makes the biggest difference. Look at the Vive and the Rift. The rift has less SDE/better sweet spot but less FOV because of the lenses.
Look I'm advocating people try the Odyssey but I didn't find it much better so I returned it. I didn't like the bulk of the Odyssey it's really heavy and I didn't find it comfortable. Plus I really didn't like the Microsoft MR software.
I had ordered it from MS and when I saw it wasn't better for what it cost I returned it. The screens do look better (colors, fov less binocular) but I couldn't make out the gauges as good as the rift.
What it did do is convince me to just get a SteamVR headset and do away with the additional stores/platforms. Hopefully LG's is around the corner.
I'm not looking to get into flame wars here over cheap hardware so if this goes south like the other thread I'm not replying.