i would say go for the GSH as you already have a RH city.
btw, i emailed AR recently regarding their EB stocks. they have both the city in SGH & RH. this was the reply regarding the leather:
Thank you for your email. In general the Bleu Electric bags (both regular and giant hardware) have been distressed and veiny. We are very limited in the Giant City so if you decide to place an order, we will have more options in the regular hardware City.
i'm sure whichever colour you choose, it will be gorgeous!