What is the difference between a 'one-on-one' course and a 'one-to-one course'?

[Torsten]

Hi,

Is there a difference between a "one-to-one English course" and a "one-on-one English course"?

TOEIC short conversations: HR person calls job candidate to invite her to next interview.

[Mister Micawber]

.
I don't think so. Or with a 'man-to-man' course, as they have it here.
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Native English teacher at Mister Micawber's