Went on Oceania at the end of 2019 and had done Seabourn (Alaska) in 2018 - definitely prefer Seabourn cabins! The layout on Oceania didn't work for us well - terrible storage options. Food a touch better on Oceania, BUT, I want to go back on Seabourn (yes, especially the new expedition ship Venture, I want to do the Norway in winter itinerary!!!) and not so much Oceania. Ship was just too many people for us (and though I adore the R class ships, I'm not paying Oceania's inflated fares on a ship that small/without amenities that others provide.....) We did use credits to get a drinks package on Oceania and had tips included from our TA, but the pricing is still high for a non-inclusive ship.....

On the other hand, my in-laws like Oceania so much, they don't want to try Seabourn, even though we've told them we prefer. As noted - different strokes for different folks ;-)

[ETA we had balcony cabins on both ships, no butlers. Cabin crew were lovely both ships. Not sure what level you need to be at to get someone to unpack for you, but that's not something I want or need so I didn't check]