So I'm looking to buy the mp9 m2.0 performance center c.o.r.e.. Now where I'm running into confusion is some are listed as mp9 m2.0 performance center pro series c.o.r.e. and some do not have the pro series. It is also written on the slide in some images but either I cant see it or it isn't there on others. I cannot find any satisfactory explanation on what the pro series is. All I can find is it is bridging the gap? So I'm wondering if the one that isn't pro series is of a higher quality or if some websites are just not adding it to the title or if the pro series is of a higher quality. I've found the gun on sale but it's a pro series and it's about 100 dollars cheaper but if it isn't as good as the non pro series then I'd rather spend the money.