I'd base the decision primarily on aesthetics-since they're basically the same design, you'd need to have a pretty nuanced ear to hear any difference between models. There will be a much greater differential for any given deck dependent on it's post-resurrection condition, and the plinth you use.
As for those aesthetics, I own a G301, but unlike (apparently) others, I think the G401 looks great-just different. Plus, they tend to be a bit less expensive. Either way, a good choice.
As for those aesthetics, I own a G301, but unlike (apparently) others, I think the G401 looks great-just different. Plus, they tend to be a bit less expensive. Either way, a good choice.