How accurate is Red Wings sizing and recommendations based on them?

Hi all,

I own a few pairs of red wings such as 1907, 3311, and 8864s.

I had my feet scanned at a RW location to get a size recommendation for all of them about 3 months ago, and made purchases based on that.

Two questions here:
Why does my size recommendation changes based on which moc i'm looking at? For instance, 875 I'm recommended 11.5D, but in the 8849 i'm recommended 12D. I'm sure there's a reason behind it but seeing as they are all last 23 I didn't expect to see a difference. Oddly enough, when I was in the RW store, they said it was recommending me an 11.5 for the 1907. I got home and linked my scan data to the RW store and it recommended me a 12D.

I'm looking at a pair of 10877s, and it's recommending me a 12 (B). The scan data does show I have a narrow and low foot, but I have never had any "issues" with a standard size D. I have 11.5D in all the red wings I own and while the length feels a little different between them, I don't notice any issues with width. Would you follow RW's recommendation on the 10877? Looking to order online, as the nearest red wing store is quite the hike!

Thanks all,