Well, I would say that there are several differences between Wisconsin and CMU. The first one that comes to my mind is the number of enrolled students. At CMU, the number of students is roughly 30 (including those who study financial economics). I would guess that the number of students is way above 100.
In terms of macro, I know Wisconsin had pretty good placements of macro/monetary graduates in recent years:
Hernan Moscoso-Boedo (University of Virginia)
Giacomo Rondina (UC San Diego)
Ethan Cohen-Cole (FR Bank of Boston but he is moving to University of Maryland)
Enrique Martinez (FR Bank of Dallas)
On the other hand, recent placements of macro/monetary graduates in recent years at CMU include:
Fatih Guvenen (formerly at University of Rochester, now at University of Minnesota)
Takushi Kurozumi (Bank of Japan)
Willem Van Zandweghe (FR Bank of Kansas)
You have to consider that the number of job-market candidates at CMU varies between 1 and 3 per year (including financial econ). Since Wisconsin is a big program, I would say that the number of job-market candidates is in the neighborhood of 15.
In terms of faculty, Wisconsin has Durlauf, Brock, West, Williams and maybe Engel and Chin (international economics). On the other hand, CMU has Mc Callum, Goodfriend, Kydland, Sleet, Yeltekin, Spear, Ales, Coen-Pirani + finance faculty. Yeah, I should say that some professors in these two sets may not be working with students anymore, but this is something you need to find out by yourself.
In terms of stipend, I would guess that if Wisconsin is giving you X dollars, then CMU is offering 2X + laptop.
Well, PM if you have more questions. Now I will enjoy my spring break :).
EMEQU