I own and enjoy both - depending largely on the type of music being presented - and of course portability if that is an issue.
However, just now for straight Jazz , It is a solid state AAD Cub 100 - who's warmth and general tone sounds anything but flat, not only due to ( what must be ) an almost occult choice of circuitry and speakers , but also because that includes a subtle 'soft clipping' feature. Someone else on this forum has a Phil Jones 'Briefcase' amp for his Bass guitar - and seems equally impressed with the Phil Jones / AAD series.
In the same vein, the Roland Cube 60 is a very popular / affordable Jazz amp. Here the priorities are not only getting intrinsicly warm yet precise tone - but also portability with a surprising amount of volume ( with tone ) on tap if needed. I gather the AER amps, Henrickson, Clark and JazzKat series are popular, as always where the ubiquitous Polytone, Roland JC120 - and now rare Gibson 'Lab' series.
For other styles, the valve amps have been the default workhorses for me so far - and if you would have told me a year ago that I would start to prefer the attributes of certain solid state amps - I probably would have doubted that it could ever have been the case.
Horses for courses, but solid state has really proved worthy of respect in recent times - especially when you can get a decent amount of volume / gorgeous tone out of something less than the size of your usuall home P.C. File server ( including speakers ).
Forgive the repeating of a previously stated fact, but when I saw a video of Joe Pass using the front of house P.A. in a small theatre as his sole amplifier ( no amp modelling, speaker simulation or effects pedals between ) - the penny dropped for me .
The does not preclude the desirable attributes of valve amps, it just makes the whole situation less 'black and white'.