I'm looking for a new brake setup on my 2003 Allez Elite which currently has Tektro calipers that came stock on the bike. I changed the pads to Ultegras and didn't notice any difference in braking performance. Will going to Ultegra calipers result in better performing brakes? I'm wondering if there is a leverage or design advantage when going with the Ultegra calipers, or is is just a weight weenie thing? Thanks for your input.