the FSPro and the FS7 use a 75~220 psi noid. (Higher than gen1 or 2)
also the fs7 uses the fspro bolt.
For all intense purposes the FS7 is a pro without the snatch grip and the noid is mounted on a manifold instead of using barbs and tubing.
The FS7 also comes stock w/ a preditor Lite board and is less expensive than a pro.
The FS7 is the best choice by far. (The NDF7 has even more goodies.)
**edit** getting tired, I thought you said "different" not defective.
There have been a few issues of a "bad batch" but any of those would be under warrenty. 99% of bad noids would fall under the "user error" catagory just like any other electro pneumatic gun.
Also the FS7 has the higher PSI noid and its a humphry... good times!
