I did a fit comparison on my blog (Leathershoereview). I have slightly less than a half inch from the tip of my Trumans in 10.5. I'm a 9.5eee in AE's 65 last (strands, park aves), or a 10E in the 1 last (Leeds, Dundees). Vince's lasting is very consistent too, versus AE, which I noticed can vary wildly.
For they people that don't have AE's to try on, both of my Vibergs are 1035 last, size 10, and they have slightly more room in the toebox than my Trumans, but I think that's because I have more wear on them. Stitchdown constructed boots seem to get wider, as they break in. I remember my Vibergs feeling narrow when I first wore them. Now I can wear them with thick socks like anonomous ism, without any issue. When I wear thick socks on my Trumans, they're super snug.
Vince always said, he wouldn't want to put someone in the wrong fit. I'm sure you could exchange them for a half size down. @gfloridafan93