My anecdotal observations suggest it's pretty different. One thing is you can (and do, if you're a kid) carry it everywhere with you and stare at it all the time. I think the phone UI where each app takes over the whole screen also increases the impact of the worst sorts of apps (like TikTok).
Interesting observation about everything effectively running in full-screen on a smartphone, taking it out of the larger context of whatever else you were doing before that.
