"Excelled in different areas" actually sums up my opinion on the SNES and SEGA Genesis in general, even though that post was just about music.
Nintendo pioneered many longer-form games in the console space, with games like The Legend of Zelda and Metroid, which were expected to be accomplished in multiple sittings and had a focus on exploration. SEGA, on the other hand, was made up of arcade game developers through and through, so many of their best efforts were fast, short, challenging, and skill-based. Neither approach is better, but both lead to very different products.
The SNES’s higher color palette and greater graphics capabilities allowed for more rich, lush worlds, while the Genesis’s faster processor facilitated action that took quick reactions, reflexes, and execution.
I’d never want to look at a colorful, richly detailed game like Donkey Kong Country 2 attempted on the SEGA Genesis, while I’d probably suffer playing a super fast-paced, intense action game like Alien Soldier forced onto the SNES.