Signing on and agent fees would be high though - neither of these players are great nor are they going to improve our 1st team. I'd prefer a class/up and coming out and out winger on-loan e.g. Leon, if we can't find someone in this ilk then we've got Anichebe, Gueye, Barkley, Baxter who are still developing and could all potentially be better than Vaughan/Larsson should they be given their chance.
I'm all for players like N'Zogbia who will make our first team stronger as I am with signings like Velios and Gueye who could be developed into class players but signing average players as squad fillers just doesn't do it for me.