Fair enough, but, as someone who watched Ionescu in every game that year (and since), I think this comparison is also misleading. For one thing, the assist to turnover ratio difference is imo really striking (and important)--almost 2:1 vs. 1:1--and all the most so since the Oregon team that year was even younger than the one at Tennessee this past season: 3 freshmen (both front court players), a sophomore (a second point guard), and a junior (a wing) started, with mostly freshmen backups and no "veteran" close to the equivalent of a Rennia Davis.
Even more important, Ionescu supplied a degree of leadership and provided the basis for a level of confidence that was crucial to the team's success both in the Pac 12 Tournament (the win over Washington) and, later, in the NCAA (beating both Duke--the number 2 seed in the region--and Maryland--the number 3 seed--as a #10 seed). In short she made everyone better. From my perspective, at least, Horston, whose physical gifts far exceed Ionescu's and whose ceiling seems almost limitless--didn't have anything close to that kind of impact.