I wear a 8C Barrie and 8D in the AE 5 last. I am a 8.5C in the Brannock. The 8D AE 5 is a tad shorter than the 8C Barrie. I do feel that my left pinky toe hits the the shoe since my left foot is the longer foot (I'm 8D Brannock in the right). But since the AE5 is longer than the rest of the AE last, I can wear it. The AE 1 last for example is too snug for me. I have to wear a true 8.5C in that last. I think you know that the AE 5 is long and narrow so it affords a bit of length. You will see that the Barrie is has a more generous toebox so no toe issue here. But the width of the 8C Barrie is definitely comparable to the 8D AE 5. Also, the heel of the Barrie may even be a bit more generous. The 8D Barrie I can't wear. It's not even possible to keep my foot steady.
Hope this helps.
Barrie is a tad longer but the AE5 is not far behind. Length are almost the same. But there is a big difference in toebox.
Heel and throat of Barrie is BIG even comparing 8C with 8D AE5.
Good comments above.
I wear 9D in Barrie and AE5. Outside of that similarity, there are very few similarities, IMO.
The AE5 is a long and narrow last. AE5 is generally considered AE's dressiest last, or close to it. Alden's Barrie last is a wider last, and generally considered one of its more casual lasts.