Why do you think Berdych and Stepanek will win easily?
I honestly think these will both be close matches.
Both of these matches have occurred twice, and only on hardcourts. Berdych is 1 and 1 with Haas. Stepanek is 1 and 1 with Ferrero.
Looking at previous results, if ANYONE has the edge, it's Ferrero and Haas. I don't see the logic in your post...
EDIT: With Haas and Berdych, Berdych won on clay, and Haas won on hardcourt.