I have an account on both. But I timed myself for about 5 minutes on both Kbin and Lemmy (yes I am that kind of person) to see which I found more intuitive, fun etc and just felt like Kbin worked better for me. Just feels more natural somehow
But it's also good that there's different options for different people and everyone's not just having to use one centralised website like the one most of us have just come from...
I have also signed up to Squabbles which is another centralised service, kind of a cross between Twitter and Reddit. It's so-so, but a lot more interesting than tildes