Is this different enough to justify the number 2? From what I played it just looks nicer, with better animations. There's also different levels? I think that's it.

The doodle jump that you can find on the playstore is not the same one that released like a decade ago. It's free and updated, it works on any smartphone and, in my opinion, is better than it's sequel. The simple tilt-your-phone gameplay is almost the same but dj1 has achievements, missions, different skins, local leaderboards, and I argue that the simple looks and animation fit the "doodle" theme better. Plus it's more nostalgic... and that's the real reason anyone would play doodle jump in 2024, right?

Ahhh the monster collecting game where catching monsters is useless compared to rolling the gacha.
I believe this is technically a paid game, but I got it for free a long time ago. I kinda had fun with the campaign, then after finishing it I realized there was no other content in the game like it. No more exploring the "open world", no more catching, no more of what the game description says is it's selling point. What's left is a continuation of the story through additional chapters that were just battles and vn cutscenes, that and the online. At that point it's just a generic gacha.