well... I think that cost is a major factor here. If amp/preamp are valued at say 25-30K and above... then any differences between the SS and Tube is a difference between what the engineer's desired their gear to sound like (and not an inherent tube vs. SS thing). That is, in the high dollar no trade-off region, SS vs. tube is moot. If the amp/preamp are together valued at say 5-6K --- within the trade off region... it will be an issue of which trade offs work best given your equipment and listening desires... because, at that level, generally differences are connected to tube vs. SS. Still... room geometry/listening position, quality of input into the system and many other factors enter in too --- often to a greater degree than does the amplification. Any general one (tube or SS) is better than the other is not really a particularly useful or realistic position to hold. It is system-by-system and person-by-person dependent and... cost dependent too.
I have owned both and liked both. I am now using a tube preamp and SS amp. Tube amps, I have found at least, are too unreliable for me (way too many KT-88's died). But sonically... both can be great... both can be less than great. Both can be anywhere in between.