zanzibar: Well, one has games in the 20th century, the other in the 19th.
One died in Germany, I believe insane, while the other died, sane, in an earthquake in Japan. (One like to go, the other liked to stay).
And, quoting a chess.com article quoting a post here on <CG>:
<The player has been discussed at Chessgames.com, quoting "sneaky pete":
"From an article by Peter Guetler in Kaissiber # 13, January/March 2000: Dr.Max Lange I (1832-1899) and (no relation) Dr.Max Lange II (1883-1923). The second Max Lange was born in Stettin, Germany (now Szczecin, Poland) in 1883. Mathematician, friend of Em. and Edw. Lasker. Played in some minor tournaments (or lower sections of major tournaments) between Hannover 1902 and Mannheim 1914. Moved to Japan in 1920 (considered Go more interesting than chess). Died during the Kanto earthquake of 1923. Author of <Das Schachspiel und seine strategischen Prinzipien>, Leipzig, 1910"
Duras vs M Lange, 1903
Max the Second was a rather strong player that might deserve to be ranked #54 at his peak. In Coburg 1904 he finished 5th of 17, 0.5 ahead of a young Nimzowitch. He also played for example in Berlin 1907, and was 2nd of 15 behind Treybal (Edward Lasker was 9th). Gino di Felice lists a dozen tournament results for him between 1902 and 1914.
The fact that so many events arenít included in the Chessmetrics database makes it rather unreliable, but I guess including all minor tournaments would be tough work.>