That 2020 team also had the best record in the West, and in my opinion had different players that provided a lot that this current team doesn't have.
3 defensive lockdown guards: Rondo, Caruso, Caldwell-Pope and a decent 3 and D player even though he wasn't the hottest shooting wise I have to include Danny Green. (Fair mention to Kuzma who is just a good offensive player).
2023 comparison: Schroder (as you said defensive chops, where I have to say he just doesn't compare to any of the 4 above), Malik Beasley is decent I would say he's a better version of Danny Green from 2023, Austin Reeves is a good offensive player and a decent defensive player but nothing compared to the 3 lockdown defenders above. De'angelo Russell (Lol), and Lonnie Walker who is a decent defender but nothing compared to the 3 from 2023. Lebron is 3 years older and in my opinion not that good defensively (it is what it is), the backcourt players all that I listed are all better offensive players than every single one from 2020, but they didn't need offense they had Lebron's high usage playing the point in 2020. Now this is where it gets interesting Mo Bamba is a solid defender where if you compare him to Dwight and McGee I think he's on their level but is not that good of a rebounder for his size and to my knowledge has been injured for the last month, if he's completely healthy and has played games with the other guys I would say like okay solid defensive center similar to 2020 but I can't say that because I haven't seen enough of him on this team. Anthony Davis (in his current state) is a fantastic defensive player still but can't rebound as well as he used to which I think will be a determining factor which means I think Vanderbilt has to step it up.
Tldr; this roster is not like the one from 2020, that 2020 roster was much more well built than this current one. If this was the roster from the start of the season my opinion would be different but I just don't think with all the trades they did that they will mesh well in time.