Volume,
I have flown the Bonanza V35B and the A36 (a lot).. .The V tail is lighter in control forces required, is very well harmonized and is lighter and slightly faster than the F33A.
The reason they stopped building the V35B in favour of the F33A is mainly the larger W&B envelope that the conventional tail allows.
If you look at a plan view for the V35B, you will see that the V tail has less area that serves as horizontal tail, as far as the fin area is concerned, it has ample, airplane was very nice to land in strong crosswinds, remember you have two surfaces acting as vertical tail.
Never spun a Bonanza, but those who did it say it is just fine for less than one turn.
The military T34 that was developed from the Bonanza uses a conventional tail.