Dr. Spa, that may be, but my only exposure to breakers, and the failure thereof, are those installed in 3,000 + hot tubs we have delivered, and I can only relate to OUR experience on those hot tubs serviced by us. I have had many faulty tripping calls that led to a bad breaker, they were most commonly NOT Square D which can be a little more expensive than others.
My experinece to GFCI breakers is isolated to hot tub use over 28 years.
Technically, they all do the same job.