guys, are there any differences between PBT keycaps and ABS double shot keycaps?

Im using Ducky's floating keycaps atm.. I ordered Vortex PBT keycaps.. not sure if its worth the money or not

So... I got myself the PBT keycaps from Vortex to replace my Ducky's floating keycaps..

Tho I do realize, my typing sound is louder than usual despite the feel of the keycaps are better. And I find that the backlighting from the letters are a bit blurry, thats normal right? and the light is not as bright as before, its kinda normal right?

Thanks haha..