I have a Vive and a WMR (Acer version). The game is 100% playable on the WMR. The tracking isn’t as good and there are a few quirks, but as a budget option for this game it is just fine. Is the Vive better? Yes, in many ways, but it is also 3-400$ more. The WMR is lighter and requires little setup which is nice, it’s much more portable for sure. The Vive has better visuals and tracking. The WMR plays better on lower end graphics cards.
I wouldn’t pay $500 for one but they have been on Amazon and various other places for $200 and I think that is a fair price.