Yeah boxing and UFC is a different combat sport. You'll probably exhaust yourself faster in boxing than in UFC. Keeping up against Jake Paul won't gonna be a huge problem for Anderson. He can do that, but it could potentially make the fight boring.
However, I don't see any huge advantages in either of them.
I find MMA faster paced, although boxing is a lot of the time a little more about sussing out your opponent, and finding gaps. I tend to find a lot of boxing fights are fighting for points where as in UFC damage, and finishing your opponents are actively encouraged by the organisation.
I can't quite put my finger on it, but they're just different. I actually struggle to watch boxing these days since watching UFC, and I used to be quite partial to some boxing. I only watch the heavyweights, and admittedly Jake Paul fights. Also some Loma fights.
I don't get why everyone is bashing on a young fighter who has a couple of fights, going against other beginner boxers. It's like they expect Jake Paul to go against Cancelo or someone, but then they'd be saying Cancelo took a easy fight. I don't think there's any winning in this, people just won't be happy regardless.
I say good on Jake. He's made a career in multiple industries, and quite frankly has the boxing purists actually wanting to watch his fights now, whether that's to route against him or not. Mayweather built a career on people wanting to see him get knocked out.