Here’s a comparison of Ninezero’s overdrive vocal mode between his original voicebank in Synth V 1, his original voicebank in Synth V 2, and his new Synth V 2 voicebank. With each new iteration, his overdrive has gotten weaker and had less impact on the timbre of his voice. In Synth V 1, using it on a high note results in a sound that gradually transitions from sung to screamed, with no further edits needed sometimes. The same voicebank has similar behavior on high notes in Synth V 2, but has slightly less grid on average notes compared to Synth V 1.
The Synth V 2 voicebank can get a little more grit by increasing tension and breathiness, but the sound is much less natural and dynamic. Even using the mouth opening parameter, neither increasing nor decreasing it gets closer to how Synth V 1 sounded. Retakes got a little closer, but the expression panel helped very little here. No manual edits I made in Synth V 2 could do better than what Synth V 1 did by default.
On a positive note, I do like how his Synth V 2 voice has improved the muted vocal mode. I was able to get a good dynamic crescendo by changing vocal modes and using the mouth opening parameter. But I think that’s not what most people use Ninezero for. They use him for his overdrive mode, and that seems to be disappointing currently. I hope that with some updates, he will sound closer to his Synth V 1 version.