i've used the renzetti traveler for almost 20 years and it hasn't failed yet.
it spins the fly on the hooks axis just like all of the other "true rotary" vises do. nothing special there!
its really a matter of personal preference as to which one you buy. try them all before you decide.
as far as a recommendation of the 3 you're asking about, i too have not used the others and therefore cannot recommend 1 over the other.
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