Well if the primary consideration was having enough horses to win in your league, Bowling Green would be miles ahead of Miami. Bergeron never won more than 8 games in any of the 5 seasons as head coach of Miami. Looks like just 19 conference wins in five years; finishing last in 4 of 5 seasons. Eigner's BG teams were just a bit over .500 the last five years with 20+ win seasons in his first two. So the ramp up to having a winning squad would appear to favor Bowling Green at this point.
It's interesting to note that Bergeron's time as Bowling Green's coach showed improvement in win totals each of his nine years before leaving for Miami. (including NCAA's his last year) So did Bergeron suddenly become a bad coach upon arriving in Miami? Did he not recruit well enough to compete in the NCHC?
As far as attractiveness, there are a lot of things to consider including facilities, fan/admin support, history of the program, the league you play in, salary, etc. I'll leave that to someone who knows more about hockey in the CCHA footprint.