How long did you wear Syracuse? Do your foundations oxidize on you? Because I was thinking maybe it'll settle and get darker as the day goes on? What did you apply it with? Maybe the beauty blender or a damp brush would sheer it out a bit and not give you so much of a mask-like look? How much coverage did you apply? Maybe a lighter application would be better? Just brainstorming here, asking questions I ask myself when I wear a foundation to figure out how it can work for me if it's not working. This happened to me with Macao and New Guinea. Macao was too light, but I'm still thinking I applied too much. New Guinea was a little too red, and although not too much darker than my skintone I was afraid it would oxidize during the day and get darker so I returned that one as well.
Also, I've noticed that sometimes I think a foundation is not my shade, but when I apply a full face ( I mean not a FULL face, but just do say my regular morning routine), I like it better, you know?
So I say all of that to say just ask those questions of yourself, maybe the answer will come to you. Also if you still have them, maybe apply lighter coverage and use them the entire day and see what happens. I guess a day when you're mostly in the house and not outside?
In the end though, if you feel that neither one is right for you, you may have to cal it a wash. I know it was hard for me when I saw that Macao was too light becuse I wanted to LOVE this foundation soooo badly! I'm gonna give it one more shot when the weather cools off, but if I can't get macao to work, I'll just have to give up the ghost.
For the record I thought Tahoe looked better on you. Sorry for the ramble. Hope it was a little helpful.