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.
Happy Listening.