Not everyone labels them the same way- to me a hopper is weaned & not quite full-grown, but to others, it's not. If they are fully weaned, they can eat on their own.
FYI, I raise my own rodents & always have, to make sure of availability of sizes needed. (I have a number of snakes still, but not NEAR the number that I used to keep, lol.) Either way, I always have too many feeders & used to sell the extras- did a nice side business for some years.