Do these mean the same?
The US Army and the US Air Force operated 4 variants of the 8x8 model under the titles M1001 , M1002 , M1013 and M1014 .
The US Air Force and the US Army operated 4 variations of the 8x8 model under the designations M1001 , M1002 , M1013 and M1014 .

Pick from: (A). no; (B). yes;
(B).