So many inconsistencies with everyone's ideas on sizing. To me, 998s fit looser than 997s, but I rock the same size in both. I agree with whoever said they're the same length, but the 998 runs wider.
The Undefeated website says these Superstars run half size large, but I usually stay true to my 9.5 in Superstars. Do the Superstar 80s run different? Last pair I had was a GR all white pair.