Posted: 15/11/2014 at 13:18
Okay, I just got out a pair of each to give you a comparison.
Cortanas are neutral, 4 mm heel-to-toe drop, quite well padded, small for the official size and narrow in the forefoot. My old Triumph 5s in a size 4 are barely shorter than the Cortanas (which I won in a competition when they had just come out, so that would be a Cortana 1) in a size 5.5 - I's say the 5.5 Cortanas would be equal in length to Triumph size 4.5. The degree of padding appears similar in the two shoes, but the difference in heel-to-toe drop is very noticeable to me - N.B. I'm a minimalist runner usually wearing VivoBarefoot Neo and Neo Trail (I have a wide forefoot and Evo and Breatho are a bit narrow for me), and Inov 8 Trailroc 235s. Just standing in the Triumphs to give you this comparison I'm REALLY REALLY noticing the heel-to-toe drop in the Triumphs and not really in the Cortanas, so a definite difference there.
I wear the Cortanas occasionally for a short recovery run if my feet are feeling trashed/bruised after a very long run (e.g. after the Thames Trot 50 in 2013), because of the padding. (Haven't worn the Triumphs since 2012 at the latest; they're only lightly worn; i really should find someone to take them from me).
Hope that helps.