Point of higher priced streamer?

Hey Guys and Gal(s):  Maybe some streamers sound better on some systems for a very simple reason:  The system is better and can reproduce the differences.  An example:  With either my Bryston amp or preamp, or just my Audire Diffet 2 with my Audire amps,  my second generation B&W's 803's with subs do not display any ascertainable differences between my Kenwood KT-917, and an fmtuner.com, marginally higher rated B&K TS 108.  With my Audire Diffet 3 preamp, the bass is a slightly bit tighter.  With the, Audire Legato inserted, everything sounds less crisp, but still a bit better than the Bryston preamp, which is even more cajone deficient down low than the Legato.  Put these various streamers into the combos above, and some differences will appear with the Diffet 3 preamps and Audire amps; differences that will not appear with the other quite good equipment, for its era.  New era better?  I should hope so, but most is far from it,  even well touted stuff.  I was given excellent Classe amps and preamps, and did not keep them.