The one with the margin inscriptions is the "philatelic" version and came with the covers open (i.e. not glued) and was only available from the philatelic bureau and selected philatelic outlets.
The one without the inscriptions is the "field stock" version that was available at any post office and usually had the front cover glued to the back cover. At first the margin inscriptions were retained in those but after a time it became almost standard practice to trim them so that the panes would be short enough to avoid the part where the covers were glued together.
The philatelic booklets started in 1991 with the May 22, 1991, Public Gardens issue. They was created by Canada Post
for the convenience of collectors to eliminate tearing the (usually) glued booklets apart to see the stamps inside. The practice went on till the middle of 2004 at which time it was discontinued as was the practice of gluing the covers together.
Hope that helps.