What does Epic offer other than doing the same things Steam does but less well and in a different app?

I’m not going to count, but by my best guess I have now 100+ games on EGS that I haven’t paid a penny for. For me that’s a rather large incentive to have the EGS client installed on my PCs. And once I have both installed anyway, I don’t see any difference between buying on Steam vs. Epic. I just use whatever is cheaper at the moment.