That’s the beauty of it - it doesn’t matter, since it’s all the Threadiverse. Lemmy, Piefed, mbin, whatever else may come along. As long as they all use ActivityPub, they’re all interoperable, and people can choose whichever one suits them best. Afaik, though, Lemmy is still far and away the most popular right now
It is usually pretty clear when someone is a recent “refugee”, expecting everyone else to hate Reddit as much as they do, like there’s a feud between Reddit and Lemmy. When it seems to me that most folks around here are just content to be our own little space