Foss had more kills in his Wildcat. Quite a few aces had more kills than Boyington.
He may have had more kills, I think both had a Jap bounty on them, but Pappy showed his entire group how to get more kills.
Yes. The Guadalcanal guys got their kills flying inferior aircraft against the creme of Japanese military aviation. While later aviators bested their records, they were facing ill-trained hamburgers.