Theres a nice feature with enve bars, stems and posts that makes them fairly unique and it's in the logo. The logo is actually slightly recessed, being that it is lower. If you drag your finger nail onto it, it won't snag a lip as you go from carbon to logo, since your nail will actually drop down into the logo. However when you drag your nail from logo onto the carbon you'll catch a lip because you're stepping up from the logo onto the carbon. It's the reverse of what you'd find with an adhesive decal stuck on the stem.
I'd say the bolts not passing all the way through deffo make this a fake also.