You also need to know that as your blood circulates the amount of glucose in it will change too, so you're not necessarily going to get the same result from different drops of blood at slightly different times even with the same meter, and this together with the slight variations you may get from the different metes are normal. Look insread for patterns and trends over time rather than individual figures. And if any result on either meter is significantly higher (or lower) than you'd expect from what you've eaten, etc, then it's certainly worth (a) washing hands and re-testing, and (b) thinking hard about anything else that might cause an odd reading - exercise, stress (both good and bad), pain, illness... can all affect our glucose levels.
I've mainly used Contour meters, first the XT and currently the Next, and have found both very good at recording data and trends for me and have both been quite consistent in their levels of accuracy.
Robbity