I'm not directly familiar with Enco lathes, but their mills I know well and I'd rate them closely behind equivalent Jet models for the most part. I'd expect their lathe line to pretty much follow suit.
The budget machinery from MSC I'd rate at about as high as it gets without going to a pricey name brand, then Jet, then Enco, Grizzly, HF then all the small competitors in a general lump with the best of the lump being pretty fair, and the bottom end being paper weights
All just personal opinion, of course.
Tiger