@Pielight have both 🙂 if financially allowed. Dont think you will lose much money from them.
as mentioned above, two very different cars. I dont run a gr yaris, instead run a grmn yaris and an isf. Similar concept i guess, light weight fun hot hatch and a gt/sport car. It is all down to your personal circumstances such as the types of road around you, nature of car use, kids, journey to work (short or long)
Imo gr yaris will be a better “one car does all” compared with the rcf. That is on the basis of better back seats, 4wd for winter use, cheaper to run and probably offer more fun than the rcf within uk road speed legal limit (if this means anything to you).
barry