http://www.baseball-reference.com/players/split.cgi?n1=hugheph01&year=Career&t=p#site
Look at Hughes career at Arlington. He was dominate. IMO it was an easy decision to let him start game 2 in a ballpark he owns in.
http://www.baseball-reference.com/players/split.cgi?n1=pettian01&year=Career&t=p#site
Compared to Pettitte, Hughes was an easy choice. However it did not work out. I would make that choice 100% of the time. It prolly works 9 out of 10 times.