Why Merlins sound better then Sonus Faber

Unistar99, that is twice now that you have asked if you are wrong. How can you be wrong when judging subjective items? Who can tell you what flavor you like best? As Rockadanny and Tboooe have noted, this hobby is very subjective, what sounds best to one rarely sounds best to another.
If you happen to enjoy the sound of the less expensive product, you are not right or wrong, you are lucky. Enjoy your good fortune.

more transparent, closer to the original recording without adding anything else

Unless you were there when the material was recorded, mixed, and mastered, and had a far better than average audio memory, or immediate access to both pairs of speakers, how would you know which is closest to the truth? Way too uncontrolled of a test to make accurate conclusions.

I don't think so at all, but may other think different as well.

Unistar99, are you a Merlin dealer?

You do not list your equipment and that could be what makes some of the difference. I build my own gear and repair gear so I hear so many different combinations in my system. They all don't make my system sound good. One amp mates better than another amp so unless you know why than your statement is completely useless. Room size also plays a part in how a system sounds, etc. The preamp I build will make your preamp sound like crap. Yes, I can back that up also.

Happy Listening.