I have two Duo-Art rolls of Country Gardens.  They are both labelled
number 6149 and played by Percy Grainger.   The first is from the
Aeolian Co., London, the second is a recut from Klavier, presumably
of a US Aeolian roll.

The rolls are completely dissimilar, both in note duration and in
expression coding.  Both are fairly painful to listen to, although
the Klavier roll is far worse.  I don't know whether both rolls
originate from the same recording.

Phil Dayson