@Krieghund:
There are a lot more differences in the rules between Revised and 1942 than just naval combat (the changes to which were pretty significant, by the way). The victory conditions also changed, as well as the rules for SBRs, AA guns, and amphibious assaults.
I guess it depends on whether you’re looking at the rules or the map as which two have the most differences. I tend to look at the rules.
Yup, agree with you in the difference between rule and map changes. But to me some changes (on both aspects) matter more than others. The defenseless transports in 1942 were the biggest change, and the VC conditions also mattered a lot but the others (map, AAs, SBR, amphibs) were minor. The overall strategies didn’t change much, although the updated unit disposition removed the need for a bid to balance Revised.
Between both editions of 1942, the map has major changes on the areas that matter (Asia, Pacific, Europe) and the unit starting dispositions allow for different Allied openings than before (the Jap fleet on SZ37, the IC in India), making KJF a real possibility from the start, unlike Revised or AA42.1. The biggest difference in the rules between both versions is the 6 IPC tank, IMO.