Era is just a sort of WoG 3.59. It keeps all that wog 3.58 had so when you play Era with wog mod enabled only, you are playing wog 3.58.

Now the advantage over wog 3.58 is that you can make your files as you want then play them as mod, without overwriting the core. The second advantage is that now you can make maps then test them 1000 times faster than before, because the scripts are external and modifiable as you play. Error in map, open the script, add fix, press F12, now the game is fixed. Before you had to restart the map after fixing internal scripts, and I know what I am talking about, I have made about 6 maps already for 3.58, then converted them to Era as soon it it went out.

Also this way of playing/scripting in real time is very optimal for learning erm: you see your script isn't working, open script, add debug commands, F12 then you see where is the error in the next second.

Then the third argument would be that all Algor scripts are commented and detailed in russian, which is a thing you will rarely find in maps or even wog 3.58 scripts-which are in english mostly. So you have the best school available online, in your mother language. Providing you download and install era.

Which you should do.