Personally would not consider the 724 as narrow. The heel has a nice fit to it but the ball is more comfortable. If you need to take up space, you can always get insoles!
Yes, 724 is one of the wider AS lasts with a chiseled toe, at least comparing to their 109, I wear US 7E in AE, I got all of my AS in UK 6.5, fits me fine. I posted a photo of the different shoe shapes in the AS appreciation thread.