the reason the two styles work so well is that you can still shoot as grace.
you can still get ammo, maybe not 100+ rounds, but you can still get quite a bit. the zombies grace fights are the same ones leon fights. their scalps still peel off, their jaw's still get detached and flop around on their face, their eyeballs still pop out from the gunshot they took and their heads still explode all over the walls with big meaty chunks flying everywhere.
i wish grace had more defensive options like a block button or an offensive option like a shotgun for the blisterheads, maybe they'll add something like this as a coin box item in the future (it's very unlikely but i can dream).