No I agree that sums it up well - I can't think of a sentence that would sound natural (as in, sounds like a native BrE speaker said it) and have the same meaning with either one or the other.
Not the OP but here in the UK there's a separate category of fridge-freezers called "American Fridge Freezers" which are typically the huge ones you describe.
Everybody I know has a fridge-freezer, but not many of those are "American Fridge Freezers".
When this is the case it’s often nice to state this conflict of interest, so others can take your appraisal in the appropriate context.
I’m not implying anything about the post, just stating what I assume to be the reason for the disclosure.