Erik,
That sounds like a tough decision, two very different programs and paths to go down, each with their own benefits. Now, this website is clearly sponsored by ATP, but the reason that the mentors are on here is because we believe in their program. We are not salesman, but we do share our advice.
I like the idea of fast track training, when flying airplanes is the only thing one is doing, the retention is much higher than when trying to balance work, home life, and flying. I would also question the price tag offered by the part 141 school. Are they quoting FAA minimum hours, or the actual time that will be needed to get the licenses?
Chris