Here is my experience with the cartridges in question, take it for what you will:
I had a 47 and it seemed like others have said, easy to achieve low SD/ES almost like my 6. Both have the fat case and small primer pockets. In my 7mag & 300mag using LR primers
(might be bad in places like Wyoming in the winter) I also achieved amazing low SD/ES when compared to using magnum primers. So through antidotal experiences, I absolutely believe, full cases with a small primer to powder ratios, are easier to control SD.
I re-chambered my 47 in a Creed when
I could not get brass. Yes, my SD/ES was on average is
slightly higher in the Creed with LARGE primers than the 47. But I recently loaded Lapua brass with the small primers in the Creed and get similarly low SD/ED as I had on my 47.
To recap my take:
-Small Primer Lapua Creed brass does produce for me, slightly Lower on average SD/ES than my LARGE Primer Creed.
-47 SD/ES & Creed with SMALL primer Lapua brass, is so close, I can not tell on average any difference.
Both small and large primered Creed shoot and I am the one that always misses.
Here's the All that said, I am staying with the Creed because I can get 47 SDs with small primers creed brass and recently started shooting a lot of factory even, though I hand load. At the end of the day, I need to worry more about wind kicking my ass and shooting more. Reloading less helps.