I'd just get both and return the pair that doesn't work. Both pairs may not work, to Marianna's point. Taryn Rose has somewhat deviated from the mission of providing orthopedically correct shoes, unfortunately. Their older styles have a visibly different shape than some of the newer ones, and all of them used to have arch support. Now she seems to just tack on a bit of poron in the footbed like so many other brands.
I adore these shoes, but they aren't going to be any more comfortable than a less expensive pair.
http://www.6pm.com/taryn-rose-breeze-yellow-patent
Contrast to this, which isn't nearly as pretty, but is the right shape for a foot:
http://www.6pm.com/taryn-rose-.....nappa-silk