Please note both maps have been updated since the ones we purchased. (The pieces scanned.)
Duncan Press -
The Old Green Map, has been charting the lakes since 1967.
They also have old maps for sale and wonderful attractive maps for framing.
Their site does compare the two versions, but it looks like they may not be comparing it to Bizer's newest.
Bizer was started 1996 according to the FAQ's on their site.
Excellent site, if you haven’t been.
Buy both! Then you’re covered.
And you will be supporting two businesses that support this site!