I hope star finder does open the door to a pathfinder second ed. or a reworking, as long as it's not a total overhaul and it's backwards compatible it will be fine. If such a new book hits it might be more valid to compare than a several year old game core sales with a just released one. I think D&D is doing well because it's new, 3.0 and PF sold very well when new, even 3.5. It was the massive change in direction that put many off 4th.
What keeps me using pathfinder even with the "bloat" is the constant emergence of new rules that I want to test - kingdom building, unchained classes, poisons, disease and crafting; horror rules like corruptions and sanity. Our group also uses hero lab so we don't actually notice the "bloat" so much. I can think of many more books I would want - even just the NPC codeces have a wealth of possibility for me.
Personally I'm happy for both to do well since it adds more variety to my table, getting my players to actually plat 5th is proving very hard.