Heritage High Numbers exists as essentially an update set for the regular Heritage release. It picks up where the first set ends, containing cards 501-725, of which the final 25 are SPs. The SPs are a much smaller portion of the set for High Numbers, so they are easier to complete.
This set has cards for some traded veterans, people left out of the first release, as well as hot rookies making their debut this year.
Once again, we have the return of short print variants with team color swaps, errors, traded, action, and others. There’s an extra wrinkle to those this year, which I think it long overdue. At least for this release, gone are the days of trying to read a tiny product code to be sure which variant you have. Instead, Topps includes a label below the card number telling you which variant you have. Hopefully this is a feature that sticks around in future releases.