Another great reason for using eBird is that it doesn’t require any media to observe and you can quickly document species and numbers. You could sort of do that with iNat but based on the interface it doesn’t work so well for certain things.
This is really useful in keeping track of your life list, or if you wanted to go back and figure out a day you saw a large number of a certain species as just a few examples. I’ve found myself digging back into old checklists for one reason or another over the years. It’s citizen science too, so there’s always that bonus. The data you submit to eBird can be used in ways that iNat data cannot (due to what is collected).
I’d recommend sticking with eBird a bit so you can get used to it, and see if it’s something you want to continue using from there. Ultimately, the citizen science aspect is volunteer so do what you enjoy!