Help With Identifying 2003 Santa Stamps

My Harris Liberty US album shows three (3) sets of similar "Santa" stamps in the year 2003. Each has four stamps in the set. All are vertical format and are $0.37 value. The first set (call it "A") is titled "Holiday Music Makers" and looks like Scott 3821-24. However, there are two additional sets of similar stamps (call them "B" and "C") on a page entitled "Booklet Singles". The first set on the booklet page appears to be essentially identical to set "A". However, the second set on the booklet page ("C") appears to be smaller in the vertical dimension and also has the characters "37USA" oriented vertically instead of horizontally as shown on the other two sets. in looking at my Scott catalog plus other sources, I cannot determine which catalog numbers are associated with each of these stamps. Can anyone clear this up for me?

The larger stamps were produced both in panes (of 20) and booklets (also of 20). The Scott numbers for these are 3821-3824. 3824a is a block of all 4 varieties. 3824b is a double-sided booklet of 20.
The smaller version comes from vending machine booklets, Scott # 3825-3828. The different VMB booklet panes are 3828b (pane of 4), 3828c (pane of 6 with 2 each of 3825-3826 & 3828d (pane of 6 with 2 each of 3827-3828).
Am guessing that one of the sets is for stamps from pane of 20, another is for the double-sided booklet stamps, and the last is for the vending machine booklet stamps.
Note that the only differences in the first two sets will be a straight edge or two on the booklet stamps. The catalog numbers for these two sets are identical ... though you could note that the 2nd set comes from booklet pane 3824b. If there are no significant differences between pane & booklet stamps, Scott assigns them the same catalog numbers. Some albums will only leave spaces for stamps with different catalog numbers ... others will leave spaces for both pane & booklet stamps even though they may have the same catalog numbers.
Added: Fixed a typo ... the booklet pane for the large set of stamps is 3824b rather than 3828b.

Many thanks for the help. I studied this for almost an hour today and could not figure it out.

I learned from this too