I had both Vitus SIA-025 and Kondo Kassai 300b so It was possible to compare them.
both were very similar sounding and wonderful, natural and emotional.
I have only heard CH at shows and while they have always sounded good I have always found that they lacked the musical communicative qualities of the Vitus amps.
I have the Vitus 030 SIA paired with YG Hailey Reference 2s which partner very well. The YGs sound is very neutral and reveal the characteristics of partnering equipment very accurately.