The others have offered analogues of choice benefits, but as promos, not as standing Permanent Choice features of the program. For instance, AA offered a promo with choice of benefits to flyers surpassing one tier (but not reaching the next, for GLD or PLT): at 40,000 for GLD, 75,000 for PLT, and 125,000 for EXP you could earn CB's.

Like much of that "Comparison" table, it is a strategic wording choice designed to hinder a full-information comparison. Any one of the four airlines in there could have produced a similar table, each carefully choosing its own best wordings and categories.