well, there's my shave with a Personna Blue Lab from a white wrapper from a box with a yellow band at the bottom declaring something about comfort. It was positively the worst shave I've had in a long while - so bad I can't think of a blade to compare it to. I went all the way round three times just to test it and it failed at every pass. Drew spots of blood three times.
Had I a choice between Lab Blue and Fake I would most certainly say, "Fake". But I can't know whether or not it came from a Personna factory, so all I can say is is, "Bloody awful".
I'll test another tomorrow but if that blade feels as bad as the first, it will be discarded after the first stroke (which is all it took this morning to know I had a duff blade).
Now to go back to the retailer - Salon Supply Store.