It's good to hear the Halogen vest is nice in real life. I wear quite a bit of Halogen, I think, and I haven't had issues with the quality. I have at least one Halogen jacket that I think looks a lot more expensive than it was, and I've had it several years.
These vests may indeed serve similar purposes, and I can see you in both of them. The vibe is pretty different, though: the Halogen one looks crisp, as DonnaF notes, and the Eileen Fisher is a knit. Would you wear dark blue? If so, you could get the EF vest in that color, for something different.