For now the only differences I've found between the two versions is the titan pathfinding in these two missions :
It's also not an RNG thing, it has the exact same behaviour every time. I don't know what causes the difference, but there's definitely one.
Hey!
By looking at Spleen's speedruns for the missions "Cerberus" and "Rampage", i notice that the original version of the missions are different from the extended edition ones. For cerberus, the titan gets close to the door later in the original version (meaning we can get it out without having to break the wall) and in Rampage the army doesn't follow the titan, meaning we can easily drag him toward our troops without dragging the whole army.
But thing is I like the extended edition, it's just nicer and more convinient in my opinion. So I unpacked the original missions using the Dragon UnPACKer and swapped the EE versions with those; so I can play original missions on EE.
Is it consider cheating ? It does give me an advantage over EE players, but not over the original version players. I think it shouldn't be much of a problem but I prefer asking.