Air Alaris or Flex?

[Deleted User]

No idea if anyone has any views about either of these shoes, but I've ordered both the Nike 2012 Running Flex and the Nike Air Alaris. The Flex seem slightly more comfy (may be to do with that I coud get them in a 7 and a half and the Airs only in an 8) but the Air Alaris are supposed to be for those with low arches, which I do have. (I have orthotics but can't walk in them let alone run!)  I can't decide between them - any help?