Sentence 1: The US Army and the US Air Force operated 4 variants of the 8x8 model under the titles M1001 , M1002 , M1013 and M1014 .
Sentence 2: The US Army and the US Air Force operated 4 variations of the 8x8 model under the designations M1001 , M1002 , M1013 and M1014 .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?