As with all such questions, try each way and see. Whatever sounds best, is best.
If you are worried about VTF, why? There is overlap between 3.0 and 3.5. So use whatever sounds best that falls between 3.0 and 3.5 that's always how VTF is set anyway- first within range, then from there by ear.
If you are worried about VTF, why? There is overlap between 3.0 and 3.5. So use whatever sounds best that falls between 3.0 and 3.5 that's always how VTF is set anyway- first within range, then from there by ear.