Yes, the same mission editor is included.
Quickly tested it just now and must say I'm not overly impressed.
The sounds are weak (driving the StuG is like driving a moped), there isn't much
hardware (3 tanks per side, Tiger II, StuG III & Panther / JS-2, SU-85, T-34),
and there seems to be some issues with automatic weapons... in that they are
horribly inaccurate, I'm talking Red Orchestra 1 inaccurate.

Even shooting
single rounds with the STG44 isn't very accurate from short distances.
Also, the files are now .ifa ending, so that might be a problem concerning modding.
So, from the quick fiddling around in the editor, I'd say you get much more if
you grab the I44 mod.