It's right there in the game stats. The Cromwell's pretty much a Sherman with no pintle and AP rounds only. It's a passable generalist but probably the worst of the five.
The M10 has more range, better acceleration, better penetration even without its ability, outright better accuracy and reloads faster.
as i said player would choose atg + crom/centaur combo instead of m10 . brit do not lack any sort of at power. i am tired and lets end the discussion.When the mod is out we will know how often the m10 used.