Hm. Not sure why you create this argument, because the facts are well-known and they... kinda refute you on all points.
Let's see.
In general, you can't compare computers and consoles because computers do so much more!
But you'll notice that any consoles that beat Amiga for sprites came
after Amiga. Amiga 500 had the
best sprite chip on the market, while its main competitors the ST and Archimedes had nothing.
You can't compare the Amiga's visionary design with a jack-a-buck budget imitation of specialized arcade PCBs. The Megadrive and SNES were absolutely horrid as soon as you wanted to do something that didn't fit within their narrow limitations, whereas on Amiga you could and can make any game you want.
Lastly, Giana and Turrican are
objectively technically better than Mario and Metroid.
Now, to showcase the Amiga's sprite hardware fully, you have to take advantage of it. By adapting your game idea to Amiga (as was done on consoles because that's all they could do), lots can be done, and the Amiga is capable of full dynamic multiplexing with fallback to bobs, but AFAIK few games implemented the full tech.