I don't notice terrible discrepancies between Firefox and Chrome for scrolling... I do notice a difference, and I'd assume that's due to Firefox having smooth scrolling on the Mac platform. However, the difference isn't drastic. It's noticeable, but still not crazy different IMO.
Here's what I found for Chrome on Mac:

So it could be enabled at some point soon, just not quite yet. I did find
this extension, but the defaults aren't all too smooth for me. I think it could probably be adjusted to better suit the needs that you're looking for, but I'm not sure if it's even actively maintained anymore.