“GT RADIAL” equivalent to “PIRELLI”?

Hey guys, I got 2 new tires today from the brand “GT RADIAL” and the tire series is called “Champiro 128”. The fitter told me that the brand is as good as “Pirelli”. Is that true? I had never heard of “GT RADIAL” before and could not really make me smart with Google either. I had two “Pirelli” tires before. And the other two are now also “Pirelli”. I know, is now a little bit bit of information, but I just want to know if it’s a good idea. not just a cheap brand or something. MfG Tim