Another vote for the Envelope bag! I actually tried on both of these bags at the boutique today. The envelope is stunning & transitions well from day to night; very classy. It is also much more compact compared to the Nolita. So you’ll have to ask yourself how much stuff do you need/want to carry.
Also, and I may be in the minority here, while I find the overall look of the Nolita edgy & chic for everyday use, I also found the opening (under the flap) of the Nolita to be a bit cumbersome. While it is easy to slip the “clip” through the hole to open the bag, I still needed to set the bag down on the counter to fully open it. Hanging it from your shoulder with one chain doesn’t work well as it hinders the opening. Just my honest opinion.
Both are beautiful bags regardless. Good luck deciding!