Stingley vs. Gardner

I've been seeing a lot of the PFF rookie stats popping up on r/nfl the last couple days and they are naming their top performers after week 6. Not a single one has Stingley even listed but every one has Sauce Gardner on there as a top rookie performer. I went to pff's site and searched.

Stingley is better than Sauce at literally every single category listed (free version only): more solo tackles, more targets, less receptions allowed, more sacks, same interceptions. Stingley is overall rated at 50.4 and Sauce is 73.2.

What gives on this? Are the paid version stats that much more revealing here or something? This just seems dumb.