As a leftist myself (not a communist), I've found that the biggest difference for now is that I'm not seeing censorship against anyone politically right of Bernie Sandars, (other than downvotes). I don't care if Lemmy leans left and/or commie, but I hate it when someone behind the scenes decides whether or not I should be able to debate/talk to my political opposites. The reddit censorship was super frustrating, especially when the goalposts of what's offensive keeps moving.
but I hate it when someone behind the scenes decides whether or not I should be able to debate/talk to my political opposites.
Then you're not gonna be a fan of federated alternatives like Lemmy. At least unless you run your own instance. Because instance admins can defederate from other instances, preventing you from reaching those defederated instances. In my mind, this is a Good Thing. I don't want to federate with nazis and fascists myself, and I want to minimize my association with anyone who does. If "having a dialogue" with people that want us dead is super important, then they can pick a different instance to call home.
The great thing about instanses though is that I can create an account on an instance that isn't deffederated to get around that. On reddit, there's no way to do that from one app.
The problem is with what we each consider nazis or fascists. I don't believe most conservatives are fascists or nazis, but a lot of people do believe that (which is an extremest take in of itself). For example, if you believe people who want more secure borders are nazis or fascists, we 100% disagree on what makes someone so.