I don’t have too much in the way of figures for WW2 20mm.  However in an attempt to clear out my loft I found some old Revell and Italeri figures. I also bought a box of the new Caesar British Infantry, so for those who might be interested I have posted the pic below, comparing Italeri, Revell and Caesar British Infantry.

Revell are the biggest, followed by Italeri then Caesar. I think that so long as you don’t mix the Caesar with the Revell you could get away with using all three makes in one army.

Click on the pic for a bigger view.