I've also noticed this, i use the contour and the contour XT, i've tried various meters and always found they read higher/lower.
I don't trust the mendor as i was hypo today, contour XT (which reads higher than the contour) said i was 3.1, mendor 5.6! Now thats a big difference!
The insulinx reads similar to the contour XT.
The verioIQ and bgstar read quite high. I don't know which one to trust but i generally stick with my contour XT as it sits in the middle, it recognises my hypos but doesn't give me wacky high readings.
I've used the contour XT for a while now and when my hba1c was 5.9%, the readings somewhat fell into that, my readings were always under 7.5 and i do test alot!
Sorry if thats aload of garbage :lol: generally the advice is use a meter and stick with it! But i'm wary of the mendor after todays performance :shock: