Slightly but I'm not going really deep on cgn.
Glock has had consistent issues executing even minor changes to their guns. They've repeatedly misunderstood the issues that their design changes have made and they've had major problems working out proper extractor geometry on the gen4s.
The reason glocks work well is really that they make good magazines. Their inability to address problems in their guns makes me wonder how they did a good job on the mags, because that's actually pretty complicated. That's why I wonder if the mags were an accident. Although double stack 9mm mags are easier. But if they were really good at engineering guns, none of the extractor craziness with the gen4 would ever have happened. They got burned trying to drop in parts that didn't fit and they took forever to work out why.
S&W does a pretty good job on the design phase. They have a long track record of building guns that run welll in many different styles. When the early-unlocking issues cropped up, they brought in a super high-speed camera and filmed a bunch of mp9s firing and started trying to solve the problem.
The problem they run into, though, is that they always have a good idea, and then cut costs until it sucks. So they have these highly skilled engineers on hand, and then ignore them. That's the classic smith and wesson problem.