I'd keep in mind that Tales has a ton of merchandise as well. Looking at
Wikipedia, I'm seeing around $2 billion for Digimon across the board. Tales has almost certainly broken that number as well - take 25 million units sold for mothership titles, drop the average price from $60 to $50 to account for potential sales and discounts, and we're already sitting at 1.25 billion without counting the two dozen escort titles (including several mobile games), any of the manga, any of the animes, any of the movies, any of the pachislot stuff, any merchandise, or the festival (20k visitors every year, ticket prices range from $69 to $127) - and that's discounting anything in the last two years, as well as the fact that one of the most popular Tales titles is about to be re-released on the Switch. I wouldn't be the least bit surprised to hear that Tales has grossed more than Digimon all in all.
Between that and the evidence we have that Tales has permeated japanese society more than Digimon (Festival, USJ ride consideration, cameos), I'd say that the only area in which Digimon might actually have Tales beat is international reach thanks to the success of the early animes.