It's a beautiful bike, and I think it is good to go with your gut.

I will say, however, that comparing the numbers, the differences between the bikes are just two numbers:
1. The Dolce head tube is 1 cm longer. That can be replicated with a more high rise stem that can certainly be bought.
2. The chainstays on the Dolce are 1 cm longer. That makes for a longer wheelbase by 1 cm and a slightly more stable ride. Can't change that.

So, fit-wise, you could have duplicated the Dolce position easily on the Ruby, but you seem to just have been in love with the Dolce. Enjoy it!