Windows 1 and Windows 2 were very similar other than the oddball decision of Windows 1 to have only tiled windows. Win 3's big advantage was the much larger pool of memory granted by protected mode. Running one large app on Windows 2 was easy; running a second large app at the same time took some effort. I wrote a number of articles about Win 2 and interconnecting multple applications into one large structure. Thankfully, I didn't get a job doing so until after Win 3 was released.
Windows/386 2.11 was fairly complete and could do VGA and better resolutions. (800x600 on the Paradise card I own; 1024x768 on 8514 and the ATI clone of such). Some of the utilites were rather lacking. I have never heard any one say something nice about MS-DOS Executive (the default file management tool). The calculator, paint, and terminal applications were very minimalist and replaced for Win 3.
The big problem with Win 2 these days is that the software archives (mainly Compuserve and the MS BBS) of Win 2 applications are long gone. Win 2 games, shareware, bunches of graphical tools, and the real applications that had Win 2 versions just before Win 3 came out all are very diificult to find. Win 2 running WinWord 1.0 and Excel with the freebie prototype Program Manager and File Manager alongside initial Corel Draw is a very different environment than what Win 2 shows up with by default.