Does various price levels of aftermarket headunits have a big significance to the sound quality it produces?

lets say an Alpine X305 headunit I use cost 15k and if I do upgrade to a full touchscreen ALpine IXA 407E
which is around 35-40K will I hear a difference?

How about their H100 sound processor? should I go with that upgrade instead?
'hear the music fully as the artist/composer intended' -- that's what Alpine claims with this processor