I have been using Olson blades most all my scrollin' life. That is many, many years. They work for me and I will continue to use them. Yes, i have tried others and i really don't see that much of a difference on my 29 year old RBI. I must have my Hawk fine tuned to the Olson blades. Since I do more Intarsia now, I find the Olson PGT and Mach blades work the best for me on my Hawk, especially with 3/4" lumber. I have decided (some time ago) to stop jumping around trying to find the perfect blade all the time and just stick with what I already know. I still have many FD, Pegas, JGR blades to use up though. I'm no expert on any of these blades, all i know is what works best for me. Just my opinion.
One final comment. When I started in 1967 there were no FD, Pegas, Niqua, JGR blades. Only Olson and Eberle blades were available back then. Maybe some Sears and Montgomery Wards blades also. Never used those. There may have been others too that I didn't know about. I remember my very first project with my Dremel Moto-Shop and Olson pinned blades. It was a silouette of a Amish wagon and horse. I was really proud of the cutout. I wish I had a picture of it. That was back in the 1960s. It looked just like this.