Blood glucose readings

did you wash your hands thoroughly before , and did you use the second blood-drop and not the first you squeezed out ?
I think there is some inaccuracy plus minus like 10% ...
but your difference is a lot ... dont know why... but one number really doesn´t count a lot , it is the overall average that tells one how well one is doing...

maybe there was a trace of sugar on the first tests finger

Sometimes there is human error, and sometimes there is a fault with a particular strip (or even a whole tub of strips very occasionally) and this applies to all meters. Whenever you get a reading that is totally unexpected, or outside your normal range for that time of day, it is always worth a second (or even a third) test. That is a big discrepancy ... but either meter could be wrong, or both meters.

Are you on medication that can cause hypos? Or do you need to inject insulin? If so, it really matters that you trust your meter. If not, then it isn't so important as all we look for is trends.

I've no experience of the meters you have, but I've a GlucoMen meter (NHS provided) and get a calibration solution for it that I use once a year to check it is still accurate.