Assuming that both meters have the exact same sample of blood, which they won't, as the sample taken will vary instant by instant even on the same finger, and most meters conform to a standard accuracy which lies somewhere between + and - 15%, so it's very unlikely that you will ever see 2 identical readings even if you were to use 2 of the same type of meters, let alone 2 differing manufacturers.
If you're worried over this then it might be worth obtaining a glucose test solution that most meter manufacturer's readily supply and see by just how much your meter lies within this + to - 15 %. range.
In reality it probably won't matter too much as all your really interested in is the relative rise (or fall) from eating or exercising so if you stick with the one meter for all your testing it's the general trend that your really interested in. Our home B/G monitoring can and never will equate to a proper laboratory blood test anyway.