I would have to say that you Shirley will get less edge life with an interupted cut.
I have seen many times quicker wear on form tools running hex material, compared to a round part.
BUT:
You shouldn't be using that option if you don't need to.
And if you need to, then you are comparing less tool life to what - ratts nests?
Is that an option worth considering?
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Think Snow Eh!
Ox