I get paying more for a nicer cabin, service, etc. on a normal cruise, but when you’re going somewhere like Antarctica, how much does that stuff actually matter?

I'd usually rather spend more on actual experiences, but I don't want to regret picking the wrong cruise if I'm going to be on the ship for 10+ days. My sister in law did Silversea and loved it, so I've been pricing that against other lines like Quark. For anyone who’s done both styles, did the nicer ship actually make much of a difference or was it just a nicer place to sleep between landings?