those two meters will rarely agree -- they will each give you the same shape of "curve" but because of the way they check the blood, there will be a difference and the ReliOn will almost always give you a lower number -- but then what "normal value" for a cat is, is DIFFERENT for those two meters, actually different between one marketed "for animals" and one primarily sold to humans -- it's not apples and oranges, more like oranges and tangelos ... similar but not the same
it's confusing for us, and probably for you too, to go back and forth between the two types; unless your vet REQUIRES tests with the AlphaTrak, my opinion is, stick with the ReliOn, use the ReliOn scale of what is good BG -- and partly because the procedures we follow here were all worked out using human meters