I bought a bunch of Accucheck Aviva strips (on the cheap) and have just realised that they are a mixture of the new type (with the small green box with the diagonal black stripes on it) and the older ones (with the yellow box with black diagonal stripes). Anyone know the difference and whether I should expect slightly different readings between packets? What should I expect? Higher or lower readings? I think the difference is between one set taking readings from blood plasma and the other whole blood btw? Help appreciated as I am about to finish with a green batch and use the yellow ones.