ogletree - 2:05 am on Mar 3, 2010 (gmt 0)
Google will only show one ad from your account for any given search. If you do that Google will decide which one to show it to. It would not be a very good test since Google will favor one ad and show it most the time. It would be best to set up 2 ads in the same ad group to get an even distribution. Google tends to like to spend money so the higher bid may be used.