Tons of people will still call both versions "boob jobs", simply because they're big (or like some people say "not normal sized"). Or they will call the bottom ones "saggy". It's unfortunate... just can't please everyone, I guess.
I don't usually care which way they're drawn, although your preferred way does look better, especially while animated. Boob jobs simply don't exist in the 2D world. There is no god in the 2D world, unless you count the creator of that 2D world, lol. If they look like "balloons" then that's just how they look in that 2d world. It's all good to me, lol.