Break angle does seem a pretty big factor in guitar tone. It's very different on the 2 S-100s I have (the 77 has a much sharper break angle than the 72 mainly due to the bridge positioning & some other changes in the guitar design) & they sound very different. The 77 is a lot tauter & brighter sounding.
Saying that, I don'y know if you will get a huge change in the break angle by bending the tailpiece down - I can't imagine it would be more than a few degrees difference (at least looking at the harp tailpiece on my CE-100D).