Twistgrip's 69 F3 340 GTS Resto

There is no difference, vacuum is vacuum. I see a mix 50/50 of people running PCV or just two good breathers. You'll get a lot of different opinions. Personally, I don't think it matters much either way on hobby-type cars.
i used to think that too, now i'm not sure. M/E Wagner Performance Products – High Performance Crankcase Ventilation Systems