My point is that the guy incline smith pressing probably can do 225 on a bb press, but he chooses to use a smith. he has gotten very strong on that movement and has worked to 395 for "x" # of reps. So i'm willing to bet his chest is pretty big, regardless of whether or not he is using a machine. It could just as easily been an incline hammer press or whatever. The guy using 225 on the incline bb press, is strong yes, and probably has a lot of mass on his chest but more than likely not near as much as the guy using the smith. My point is strength is strength on whatever you are doing. I am only talking about bodybuilding here. I would not apply this training for a sport like football or basketball where free weights should without question be the basis for weight training.
Now back to my example, say incline bb boy works up to a 305 pound press, that great and he's going to have a lot more mass on his chest. But if incline smith boy keeps pushing at the same rate as mr. incline bb, he will still be bigger. Granted neither of these two hit a plateau and gain strength at the same rate.