The main difference is that Nintendo had a massive head start. Secondly because of their policies they had very little third party support which forced them into dumping all their money into their IPs, the main difference is that rather than branch out like Sony, they decided to focus on the same profitable IPs because they figure it was better for merchandising(and they were right). Count how many different triple A playstation exclusives there have been over the last 2 or 3 generations compared to Nintendo.
I see, I've stepped into an alternate reality.
You argue that Nintendo had a massive headstart over Sony and therefore the NES and SNES eras where Nintendo had very little third party support forced them to foster their own IPs. You argue that a high amount of different IPs that failed to catch on is something to be proud of.