Jabberwok
Mildly Dipped
Yeah Sure. The companion selection system is identical (minor I know) and the way you seem to talk to them, build relationships and stuff, is pretty similar. They have really non-compelling companion quests, which are pointless since companions are loyal no matter what. Companion quests had a real purpose in mass effect and affected the end game, but I can't comment on that since I haven't beaten Outer Worlds.
Both games feature a large player ship with an expanding crew, and of course an AI voice assistant. The Normandy from Mass Effect was more interesting in my opinion, having an actually emotional impact when it is destroyed. EDI is a much better AI assistant, and the banter between Joker and EDI is till better than any of the banter in Outer Worlds. Exploring the ship in ME you'll always find an interesting conversation, conversations which you look forward to after every mission. Outer Worlds tried to do this too, but the companions have the personality of a dementia victim.
Of course there's the giant ship hubworld (groundbreaker) that's similar to the Citadel. The ground breaker is visually stunning, at least the first time you view it, but it does not have the depth nor interest of the citadel, which is at its best in ME1.
I hope that satisfies your question.
Thanks. I mean, it seems like both Mass Effect AND Outer Worlds just used the formula established by KoTOR. A franchise that both Bioware and Obsidian worked on. Though Bioware established it with the first game, obviously.