Well, the average deviation is just a measure of precision. Of consistency.
From your tests, yes most likely your ReliOn is better than your One Touch.
But for what it’s worth, without comparing it to a lab draw machine, or a number of other meters, you don’t know if your Relion is consistently accurate, or consistently inaccurate.
Suppose you had:
| Meter: | Tests: | ||
|---|---|---|---|
| Contour: | 78 | 81 | 88 |
| FreeStyle | 83 | 86 | 90 |
| One Touch | 82 | 84 | 88 |
| ReliOn | 65 | 66 | 64 |
In the example shown above, the ReliOn would have the best avg deviation when compared to only itself. When compared to all the other meters, it would be the worst!
To make sure your meter is great, it should be both precise and accurate.