In the first one, the break-up scene, Belle and Young Scrooge are fully colored, tangible figures, which is a change from the previous visions. At the school and Fezziwig's warehouse, the figures Scrooge saw were ghostly, white outlines. This vision feels more real and important.
Belle's wearing a blue dress and red roses in her hair, so she's hardly a woman in mourning. The dialogue is abridged, but gets the gist of the conversation across nicely. There's no one incident that seems to have sparked her decision to leave Scrooge and she doesn't even suggest that his feelings towards her might have changed. She's just noticed his greed and wants nothing to do with the man he's become, though she's sad about it and doesn't wish him any harm.
Scrooge is visibly upset by the memory and covers his eyes in one panel. But the text points out that the Spirit "forced him to observe what happened next," and on the next page the Ghost has its hands on Scrooge's arm. The Ghost is physically smaller than Scrooge (which is faithful to Dickens), so Scrooge looks like he could get away if he wanted to, but he's compliant. The Spirit's "forcing" him to watch probably isn't an act of physical restraint in this version, but just evidence that Scrooge has accepted the Spirit's authority.
The vision of Belle's family goes back to the white, transparent figures for a panel, but they solidify and gain color in the next. We probably shouldn't read much into that, but I'm still interpreting it as this is a vivid, important vision, though we got to see a hazy, ephemeral image as one scene transforms into the next.
Belle's family is reduced to her husband and one, smiling, quiet baby in this version, so there's no large, boisterous bunch. Belle's husband doesn't ask her to guess which old friend he saw earlier, but she guesses anyway and gets it right, of course. The husband mentions that Marley is near death and that Scrooge is quite alone in the world. Their pity causes Scrooge to cry out in terror according to a caption and ultimately to spring upon the Ghost. But as Dickens wrote, there's really no contest and the Ghost seems untouchable.
There's no final, shocking transformation by the Ghost into the various faces from Scrooge's past. And since this version of the Ghost never had an extinguisher cap, Scrooge doesn't get to use it to try to snuff the ghost out. Scrooge simply takes a run at the Spirit and then is asleep in the next panel, with a caption saying that he "was conscious of being in his own bedroom" before drifting off.