The DMT 1200 would leave a better finish on the hone than the 325. But using a finer grit after that would be even better.

I do take issue, as always, with using a 1200 diamond grit to set a bevel. I feel it is much to coarse and aggressive to properly set a bevel. IMHO a 4000 grit should be used to finish establishing a straight razor bevel.

Just my two cents,