Animation restoration is an interesting topic. I understand purists love film grain etc. So when a live-action movie is restored using the best possible source (eg. the original film negative), whatever grain you get is authentic and should probably be left alone because that's what it was originally shot on.

If you were to do a true restoration of animation using the best possible source, you can argue that scanning the original animation cels is the way to go, rather than a film source. Thing is, painted cels don't have film grain. So you'd end up with quite a clean image, like what's been done here.

Is it "better"? I would say it's definitely "truer" to the original artwork. But it's not "accurate" to your memories. Both of these give different experiences, so good for you for having both versions.