RH will be light as a feather. GGH adds a bit more weight, but if you are used to heavy-ish bags, I would definitely go with GGH. It's gorgeous on black!
GGH on black is GORGEOUS but some do not like GH on a City bag coz the HW seems to make the City look busy. I do like GH on a City but have yet to own one.
I am sort of going through the same dilemma about my next bbag. I love the look of the giant hardware, but I find that it's bulky when I put the bag under my shoulder. (The giant hardware from the handle hits the giant hardware on the bag...) Also, it is quite heavy even when empty. RH is less exciting to me, but the prospect of having a comfortable, light bal is very tempting.