I didn't find substantial difference measuring the inner teeth space, the biggest difference was 0.17 ... George apparently found a much bigger difference, almost 1mm. This may be related to small thickness differences, not sure how that affects the shave, if at all.
Anyway, regarding the base plate width I was talking about, this was the second biggest difference I have found ( the widest plate is the US style made in England, but I excluded that one).
This is my workhorse, a Twin Pin:
And a Round Pins:
Notice how the caps are the exact same width, but the base plate of the Round Pins is 0.36mm wider. This difference added to the YMMV thing, may be responsible for the different perceptions we all have of these razors, even concerning models that are supposed to be the same thing.
Anyway, regarding the base plate width I was talking about, this was the second biggest difference I have found ( the widest plate is the US style made in England, but I excluded that one).
This is my workhorse, a Twin Pin:
And a Round Pins:
Notice how the caps are the exact same width, but the base plate of the Round Pins is 0.36mm wider. This difference added to the YMMV thing, may be responsible for the different perceptions we all have of these razors, even concerning models that are supposed to be the same thing.
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