Ken,
If you don't go and get the actual Deltec/H&S needlewheel pump, then your results are kind of bunk. You won't really be able to answer if the Eheim's with the pinwheel type needlewheels actually perform better than say an OR 3700 with its needlewheel.
You won't be able to say, well, the OR 3700 actually performs the same as an H&S eheim 1260 because you won't actually have the exact pump they use.
If you were really trying to do a test, then that would have to be the route you take, but I can understand the money issue.
Although, I will actually probably be purchasing the H&S eheim 1260 pump and the OR 3700 and then having both installed on a 32" tall skimmer that has an 8" diameter with air meters for both to see which pump draws more air and to see which will perform better over a one month period.
Peace,
John H.