AITA for buying my daughter a more then twice as expensive Christmas gift then my son?

I (41F) have a daughter (15) and a son (13) with my husband (49). Let’s call them Emma and John. Emma and John do not have a good relationship (sibling rivalry, accusing of being the favorite child and so on).

My Husband and I decided to buy my son a Nintendo switch 2 plus a game for Christmas. We spend a little more then 500$. In my opinion this is a big gift and exactly the thing that will make him the post happy.

My husband wanted to buy my daughter an iPad Air and the pencil as a gift and I agreed to that. But then I found an IPad Pro 512 gb for only 1000 dollars so I bought that instead and told my husband only after buying it. With the pencil it will cost us nearly 1200$.

My husband freaked out when I told him. He said that this is unfair to John and will only make the situation between our kids worse.

I told him that Emma will need the iPad for college and stuff and that this device will last many years and that each kid has individual needs and wants but he is still angry and even accused me of favoring my daughter. Now he is threatening to return the iPad unless I fix the problem I created.

AITA? I really think that gifts don’t have to be the exact same value every time and that it’s no big deal.

Edit: I have the idea to buy AirPods for my son to even it out a bit. Switch 2+ AirPods is really everything he wanted.