If you look behind the acting itself, there's that typical "tone" Bosch has that makes it easy to identify him, but a LOT of actors have this. Yuri Lowenthal, Liam O'Brien, Kate Higgins, etc. But if you look beside the point that you know it's Bosch and stop listening to that typical tone, you can see that his voices are pretty different.
Let me give you an extreme case, take Kota from God Eater Burst. Compare that to Yu.
Kota is also voiced by Bosch, and even as someone who loves his acting, I could BARELY notice it was him.
And besides, while I'd love to see Kagura voiced by Bosch, I wouldn't mind someone like, say, Kyle Hebert.