Yep. Thanks again, Juha.
Armour, mobility (both theoretical and actual combat condition) firepower (both theoretical and actual combat condition) are, IMHO, the critical design factors for tanks, together with of course ease of production, operation and maintenance.
Which brings me to another question. What were the maintenance requirements of the Matilda and Churchill as compared to the Sherman and the Tiger? We do generally know that the Sherman was comparatively easy to maintain and the Tiger was an dog, but who can give us some hard-ish figues and actual war tank mechanic anecdotes?