Regarding armour it’s hard to say if the original A10 is 30mm front plate with a 14mm mantlet or 14mm front plate with a 14mm mantlet. A10A is a 30mm front plate and a 30mm mantlet (though the mantlet could be more in traditional British fashion).
I see, very interesting, i already liked the A10 as a tank, in my opinion it looks better than the Cruiser Mk. III and IV, but the armor profile is the main reason why i want it, maybe the mantlet is thicker on the Mk. IIA, hull down it could be a powerful vehicle. I can’t wait for it…