Bill,
I've written quite an extensive article comparing vehicles from different manufacturers with figures from different manufacturers... see either Wargames Illustrated No?? can't remember
It's also in the WARCHEST:
Ascending Scales
My recommendation is NOT to put BAM stuff together with Corgi. BAM is 1/56th and Corgi is 1/50th - the differential is becoming too big at that point.
1/48th & 1/50th sit well together
1/60th & 1/56th match quite well.
You pays yer money and takes yer choice!!