Yeah, those are the same clips upscaled. I really don't think the enhanced in game models would help the cutscenes much (meaning they would be a whole separate project). It might not be an enormous effort to redo the video, but it would certain be some cost and effort, and there's a lot of nostalgia associated with just having sharper versions of all the original clips. For a $20 release, I'm very happy with the level of effort that went in.
Several million dollars easily; just re-creating all the assets for the cut scenes to a quality that would hold up in 4K would be costly. And that's money and resources that EA might rightly say should go towards a AAA title instead.