Gosh, they are totally different but I vote for the Alma MM - it is such a show-stopper! I am a very casual person and think my MM's look great with jeans.
I have both (but the Trevi PM), and this is a hard decision, but I would say the Alma MM. It is such a stunner IRL, and you feel so special carrying it. It's like wearing a big diamond, because it shimmers so much, and catches the light.
The Trevi IS versatile, but when you spend $2000+ on a bag, you want to be wowed and enamored with it. The Alma fits the bill
I don't regret one penny that I've spent, and am currently saving for another...
I think you'll get more use out of Trevi as an everyday purse, even though Vernis Alma is absolutely stunning. Pomme and Amarante look like pieces of candy!
Trevi..it more funtional. The alma is gorgeous, but I don't see this as an every day bag. If your going to break your bag limit, it should be on something that you will use.