--compare the results
SELECT [1].wait_type, 
([1].wait_time_ms - O.wait_time_s) accum_wait_ms --red squigly line under wait_time_ms on this line
FROM #OriginalWaitSnapshot O
INNER JOIN #LatestWaitStatSnapshot [1] ON
O.wait_type = [1].wait_type
WHERE [1].wait_type_ms > O.wait_time_ms
ORDER BY [1].wait_time_ms DESC

--compare the results
SELECT x.wait_type,
       (x.wait_time_ms - O.wait_time_s)     accum_wait_ms --red squigly line under wait_time_ms on this line
FROM   #OriginalWaitSnapshot O
       INNER JOIN #LatestWaitStatSnapshot x
            ON  O.wait_type = x.wait_type
WHERE  x.wait_type_ms > O.wait_time_ms
ORDER BY
       x.wait_time_ms                       DESC