I also have a 1967 Minkus Master Supreme that I use for a backup
album. The pages are more comprehensive in the inclusion of stamps,
but there are far less blank spaces. Consider this, coupled with the
fact that Master Supreme does not include many of the high face value
issues in their spaces. So, you often are left with the 3 high values
from a particular series, and no spaces whatsoever on which to mount.
Out come the same blank pages as before, still needed to accomodate an
album which was considered to be more comprehensive.
In summary, I like both Minkus Comprehensive as well as the Master
Supreme. You will end up supplementing with blank pages in either
case, so your main consideration is cost and space you have available
to keep your collection. Whatever you do, I do recommend trying to
find an older (pre 1980) edition. After that, so many new issues came
along that they removed too many classics spaces in my opinion. You
also save big bucks. My Minkus Comprehensive from 1972, still white
with maybe 100 US stamps up front, cost me $22. Meanwhile, a new
Comprehensive is in the $100 range. As for a new Global Supreme set,
you get like 14 volumes and the cost is near $900. I bought a 1967
single volume for 5% of that.