I needed 2 pairs of work shoes, so I purchased a pair of each in black leather because I could not decide which one would be better. I have medium-width feet with high arches, so I like good support for the foot. Here is the comparison.
Encore Groove Pro: More expensive. Very lightweight. Roomier (good for people with wider feet or to accommodate thicker socks). Overall flatter with less foot support. Leather is matte. One shoe squeaks.
Encore Nova: Cheaper. The front of the shoe has more elegant look. Very good foot support with great cushioning, snugger fit, and higher heel. Leather is shinier. Great work shoe. This is my favorite pair!