wc3edit.net

Is there any easy way to find changes in unit/item/ability stats between two version of the same map?

Dump the object data for whatever type of object you want, using RMPQEx, for both maps. Then, compare the two for differences, using a program like WinDiff.

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My Warcraft III Tool Collection
If you want to chat/game with me:
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Does that work on war3map.w3u? Or do I need to convert it to SLKs with Widgetizer or what?

It probably wouldn't work if you just used it on the war3map.w3u, because the file isn't text-only. What you should do is open the map with RMPQEx, click Dump object data..., select the Unit checkbox, and hit OK. It will make a text file with information about all the units on your desktop (or wherever the path at the bottom of RMPQEx is pointed to). Do that for each map (but in different locations, so the first one isn't overwritten by the second!), and then compare those.

_________________
My Warcraft III Tool Collection
If you want to chat/game with me:
Blizzard: Senethior459#1962
Discord: Kyle#7409
Steam: Spacekidkyle