There's a ton of pics on here of the Tama and SSC R2 together - they go beautifully together in terms of matched "look." The weathering on R2 is pretty subtle in-hand.
The bigger question is that the SSC R2 is about 10% underscale, which is just enough to be slightly noticeable. It's possible the SSC 3PO might be a smidge shorter than the Tama 3PO so would make the R2 height issue go away (at least for a 3PO/R2 display pairing.) Tama is about the right height. R2 does look a bit too short next to other figs too.
The bigger question is that the SSC R2 is about 10% underscale, which is just enough to be slightly noticeable. It's possible the SSC 3PO might be a smidge shorter than the Tama 3PO so would make the R2 height issue go away (at least for a 3PO/R2 display pairing.) Tama is about the right height. R2 does look a bit too short next to other figs too.