I've yet to discern a difference in quality of officer based on the commissioning program.  If you are highly motivated, NROTC will give you more opportinities to excel and take in other experiences.  By this, I mean that you can hold leadership billets in the unit, go on summer training, field excercises, etc.  By no means does that mean that NROTC grads are better as a whole.
I'd look at the money aspect.  If you're going to an expensive school, the NROTC scholarship is worth beaucoup bucks.  At a state school PLC may come out ahead in the long run, since you pay entry base date will start when you enroll--that means an extra couple hundred a month when you're commissioned.