I believe that gap and blade exposure are equally important to a close safe shave. Karve publishes both gap and exposure for each of their plates. As their gaps increase so does the exposure. The Rockwell 6C may publish the gaps, but not the exposure. I believe as their gaps increase their blade exposures decrease.My thoughts are if I buy a relatively cheap adjustable razor. IE Future clone or Rockwell 6c, I could find the gap I like. Then buy the Karve plate to match. It could get a little pricey if I start buying Karve plates without knowing what I want.
If you were to get the Rockwell and use say a #5 or #6 plate thinking this larger gap is comparable to other razors of comparable gap, you will be shocked how positive exposure will increase the effectiveness. The Blackland Blackbird's gap is close to .68mm which sounds pretty tame. It has a good deal of positive exposure, but the mm is not published. I find the efficiency is much greater than Rockwell's #6 plate.
If it were me I would order the Karve C plate (gap .85mm & exposure +.09 mm). I think more razors have neutral to positive exposure as their gaps increase. I know Karve's E plate is gap 1.10mm & exposure .17mm, and your F plate has even more of both. Because they publish gaps & exposures you can learn more from them than any other manufacturer.