I've never used the ESP, but it has stepped adjustment which is not ideal for espresso. You only get 20ish grind sizes to pick from, and you'll probably end up using 2 or 3 of the available grinds. You'll be wishing for "in-between" settings because espresso is very finicky.
The original Encore had pretty inconsistent grind, with lots of big chunks, lots of fines, and plenty in between. This isn't ideal for drip coffee, but it's fine. For espresso, if the grind quality is similar, it'll give you a lot of frustration.
A good espresso grinder is expensive. Home espresso is expensive.