10000% swing.
I used the bouncy seat way more with my first because it was more portable than the swing. I could bring her in the living room while I cleaned, or in the bedroom to fold laundry, or the bathroom while I showered. The swing , on the other hand, was pretty stationary.
Update, got a bouncy seat for 10$ off marketplace and a bassinet for 20$. I do plan on going to some garage sales or some mom to mom sales as we still need a lot more clothes and the smaller stuff. But got the bigger stuff done. If I can find a good deal on a baby swing I will get both still.
From friends’ experiences some babies don’t like the swings, I think most like the bouncers so I just put one of those on my registry