No, it's the same program. It started out as a native OS/2 app and I actually bought it. Then the author started developing it for java. Doesn't look like anything has been added since the OS/2 version, except the version number.
Go back one step on your url and it'll show the OS/2 Version
Had it already on disk and installed. So much programs for OS/2
. Okay, put them together on screen with the question find the difference. You can handle the map in any way on the OS/2 version with the bars. Had to do that because both didn't showed me the same picture, while place(city) and time are the same. If you mark deep sky objects you get them all in the OS/2 version, with the Java version you have more options with magnitude. In the OS/2 version you have to deal with the installed fonts. The fonts in the Java are a little better. Found a bug with fonts in OS/2 version, not all can be set to the options given in the window (menu). In the Java version you can show the complete solar system, did not find that in the OS/2 version. And yes, not much difference, we do live too short to see major differences in the maps, apart from that its all following its orbit. If so, that would be spectacular.