I think FIM was also meant for an older demographic than Bluey. If FIM was for 9 year olds, Bluey was for 5 year olds.
I think FIM is basically a y7 show that’s a bit more toned down and with an educational spin. Similar to Powerpuff Girls. While Bluey seems more like a pure educational show Blues Clues.
I also think FIM is a little more edgy if you get what I mean. Even if its pretty innocent I think it has a certain snark that Bluey doesn’t have. Which makes sense since the writers came from Cartoon Network. Bluey seems more more innocent.
I havent watched enough Bluey so I don’t really know for certain but that’s my guess.