I did notice one difference from the R1 figure! The brow of this dome, it's rounded in the front while retaining the Y indent. That's a feature unique to Kenobi Vader. All other Vaders have either the smooth brow without indent, or pointy brow with indent.
Although at a glance, everything else still looks like it's probably the same kit as R1 even if it shouldn't be. I guess they've only gotten as far as that one dome mod.
Most notably, the chest armor should be a different shape (slightly more like RotS). The cod piece should be a bit different than the R1 diaper, flatter. The cape collar should be wider and exposed with a hanging chain. On the chest box, I can't see the top straps, but I do still see the side straps. Box straps should not be present at all on Kenobi vader (like RotS). And I think the three grey buttons on the chest box should be a slightly darker grey than R1. The lightsaber should also be ANH style (not ESB/R1 style) but I can't see it well in these photos.
That's all just the bare minimum for Kenobi accuracy though. I'm still not interested until they battle damage it.
The chest box strap situation could be solved by magnets. And then it would also allow the buyer to swap between clean and damaged boxes easily.