I think both were pretty good. In terms of talent I'd say Capa was much more naturally talented. Legend has it that he learned the game just by watching him and his uncle play and he beat his father in the first game he ever played. That's insane.
Bobby started early and worked really really hard since he was 6. He was obsessed with chess. He ate chess, he slept chess, he spent almost all of his time thinking about chess. He played against himself. Yeah, I think his hard work materialised and he showed brilliant combinations on the board. Towards the end of his career I guess he was fed up of opening theory leading to boring draws. Everyone knew the exact lines till move 20 ish and led to equal positions. That's why he suggested Fischer Random. I'm personally a fan of chess 960. But sometimes it can lead to very unbalanced positions from move 1.
Yeah I agree with Capa that to get better at chess you certainly need to study endgames.
#20
Fischer was always nice and courteous towards other chess players. He was also friends with Spassky, Hort, Torre, Gligoric, Byrne, Lombardy, Larsen.
He was a tough negotiator with tournament organisers regarding fees and playing conditions. Like a one man union for professional chess players. At the Lugano 1968 chess olympiad he showed up to play board 1 of team USA, but after inspecting the playing hall he objected to the boards, pieces, tables, chairs, and lighting. The organisers refused to meet his demands, so he flew back to the USA, relinquishing all his fees.