Hi Julio,
Long time-no-see! Good to see you again. Interesting pair. The San Mera (wish I still had mine) is usually a brown (wild type?) based red, and I forget what RGD is, but it looks like a pigeon-based red. Pigeons have been cleaned up quite a bit lately, but you might still run into peppering; the usual P/NP issue. With some good selection, maybe F2's would be interesting!