I used to think that a baby grand piano was superior to an upright piano but this is definitely not the case. The reason most people think this is the poor quality of most upright pianos.
A 1930s BlutherBlüthner upright piano sounds nearly as good as a BluthnerBlüthner 7ft grand piano, with a fantasatically sonorant bass. A BluthnerBlüthner baby grand of the same era definitely sounds somewhat "dead"“dead” in the bass, indeed has somewhat of a toy like sound compared to a proper piano with long strings.