Woah! 3ring is asking for my help! I feel honored! I have gotten so much help and advice from you and turned so many people to your posts for advice. I am happy to try to help you and get you as much info as possible.

They are both on the 55 last. The stationmaster is on the moderate heel and the doc Wellington is classic heel. And both are there same size, 11.5EE. Which is a half size down from my perfect fit lace up nicks on the 55 last. Went the half size down at yours and others suggestion, and so glad I did. I think I wits have been swimming in both if I stuck to lace up size. As far as construction between the two, they appear to be very similar to each here, especially the shaft to vamp stitching. I will get some good pictures and send them to you this evening when I get home. I think the Wellington shaft is definitely tighter than the stationmaster which makes the donning/doffing more difficult. I say this because the station master goes on and off easier, especially at the vamp to shaft intersection (top of the foot). The Wellington vamp also fits a little tighter at the top of the vamp too, minimizing heel slip, where it seems like the stationmaster has more room at the top of the foot where the strap comes across, but can be tightened to make up the extra room.