I have five Pearlescent tubs. Four on our showrooms, and one in my home. They don't scratch easily. Yes, you can scratch them, and if you need to, you can buff the scratch out.
You can also scratch the textured type of surface, but it doesn't show as much.
People have been making glossy-finish tubs for over 20 years, and I have taken my share of them to the dump - many are still lookin' good! Some are all scratched up. Take care of the tub, and you wont have a problem.