Makes no difference. All the codes are exactly the same. Actually, using an established model's codes is a lot better because the newest user learns are usually riddled with mistakes and missing commands. It took a couple of years before the latest DirecTV models has code sets as good as the older models, in spite of the fact that all DirecTV models use the same codes. Logitech is very slow to recognize similarities among devices.
Bottom line is there is no reason to learn any codes. The 722 codes will work 100%.
Interestingly, I noticed that the hopper remote is now made by UEI, the maker of DirecTV, one-for-all, JP1 and most cable remotes. That means a much bigger and comprehensive code database for your other devices than the previous OEM had. Their code database is even larger than logitech's by a huge margin.