I have the last generation pad and stand (both fast charging). This is the only way I typically charge my phone, and it works great. I've read a lot of reviews of the new convertible charger that came out alone with the S8. Reviewers suggest that the charging speed is equivalent. It MAY be slightly faster, but we're talking a matter of a couple minutes saved on a charge from 50% to full.
Of course, perhaps the story is different for the Note 8. Anyone have more up to date info than me?