Stephen Goodman touched on a good subject.  I think if we examine more
rolls from the early years of Clark we will probably find this to be
true.  I have noticed this on the Clark-arranged A rolls from the early
'20s.

There was some hot arranging going on at that time and it seems to have
changed around 1925.  Maybe they had to trim things down economically so
they decided to use the same arrangements for everything.  Whatever the
case, there's nothing like the sound of those early 20s arrangements!

The word "Jazz" is an understatement.  One of my favorites is A-roll
Automatic #615 -- just try to keep your feet from tapping!

Another possibility to the differing arrangements:  Sometime around
1925 Clark decided to 'standardize' the coin piano and orchestrion
arrangements but keep the xylophone arrangements separate.  With the
new KT special and the success of the 4x rolls, this became the
alternate choice for arrangements.  They could then use either the
standard QRS masters or the xylophone arrangements to embellish.

Before this standardization, they made different arrangements for
A rolls, etc.

Just a thought.

Brian Smith