Not really. Sure reddit has more content and users, but for me lemmy has enough of both (and as time goes on I think it'll increase).
Lemmy has no surveillance capitalism and a choice of applications to use.
I suppose currently reddit may be more user friendly than lemmy but I think lemmy will get better in time. Hopefully lemmy gets it's own version of a "multi-reddit"
I ultimately left reddit because they pulled support for third party apps, which got me thinking more about the surveillance capitalism that comes with using reddit and decided I was done with it (except in the way I mention below).
Edit: If a reddit post shows up in a search result I will click on that if I think it'll help me answer my question. That's the only way I'll use reddit.