Another excellent explanation! Thank you Marty.
:beer1:
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The smiling blade is easier in some areas, but I generally get more irritation with a smiling blade, not less. I have a few of both types, but my very best shavers have a straight cutting edge (I have a relatively small collection though).
I think with smilers, technique needs to be modified some. A smiling blade gives me the chance (with careful planning) to use the heel and toe of the blade more effectively in curved areas like under the jaw and around the chin and nose.
However, it's a matter of trial and error (and equally sharp and smooth edges). In the end, each of our faces is different and is going to feel better being shaved differently.
That's what I like about this hobby...trial and error and varying advice help one find the perfect shave for him.
Smiling or straight doesn’t seem to contribute to razor burn for me, or the lack there of for that matter. As long as I have a rounded heal as I use those for the hollows of my neck. Would have to be an Sk1 for me to be able to use a smiler in the hollows of my neck.