i was told by an attending at a 2-4 program that you can use the same personal statement. they know that you are not interested in medicine -- they know you want to do em. i don't know about tailoring it towards medicine vs. surg though i think for medicine people, it's obvious why one would choose medicine. anyhow, they are looking more for a hard working, reliable person who won't cause too much trouble for a year.
(i applied a few years ago and used the exact same personal statement. got about 8 of 9 prelim/transitional interviews)