Baby food.

So I am having my son try different baby foods. I’ve noticed that some are number 2, is there really a difference? My son is 4mos. And he loves bananas, apples and pears. I wanted to try the other ones but I noticed they are for sitters? Or for 6mos and older? But they are both purees. Just different flavors. Like avocado strawberry and blueberry. Can my son still eat this? Or is it specifically for older infants? I’ve already gotten the go ahead from his pediatrician to try the purees.