So quick review/impressions. I have pretty mixed feelings as I'm someone with the Sideshow R2 who actually uses the lights and some of the accessories from time to time--occasionally open up a panel for one of the arm attachments and also use the drink tray to mix it up. This Hot Toys R2 is both perfect, yet in a way boring due to the limitations. The current plan is to keep both until a Hot Toys OT version comes out and then I'll re-evaluate.
Important Pros: Amazing metal dome, girth
Important Cons: No accessories--none, always have to have the projectors lights on if you want lights (this really bugs me)
Less-Important Pros: Sounds (love them, but won't use them often)
Less-Important Cons: Blue paint on panels seems too glossy
Even weathered, I think this R2 goes really well with the Tama 3PO as it's cleaner than my Sideshow R2. I'm not sure the Tama R2 one will look as nice for the simple fact that the Hot Toys dome absolutely reads as metal (cause it is) the same way that Tama 3PO reads as metal (cause it is).
A shot like this one below shows off what happens on the shelf, the metal of Hot Toys R2 and Tama 3PO will both reflect the light in a way that paint alone likely won't, can't imagine the Tama R2 will be any different than Sideshow's in that regard.
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This one also shows off the too glossy blue paint (almost looks wet sometimes):
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