Comparison Terminology

Hi all,
I have a couple of questions about terminology used in sentences with
comparisons.

It seems to me the clause has 4 components:
A. what's being compared
B. what the subject is being compared to
C. the attribute being used for comparison
D. the rest of the clause

Examples:

1. John bakes more bread than Mary.
    A=John  B=Mary  C=(more) bread D=bakes
2. John bakes more bread than cakes.
    A=bread  B=cakes  C=(more) [quantity of?] D=bakes
3. John bakes potatoes more than he boils them.
    A=bakes  B=boils  C=(more) [often?] D=John, potatoes

Now for my questions:
First of all, is this a good analysis?
If so, what terminology is used for the various components?
If not, what improvements are needed?

Thanks,
Jeff