there is more flexibility with mapping with the Rapidbike module, including ignition changes.
there is also more potential for getting things wrong. I know a guy who blew his K1200R motor by getting too aggressive with the ignition mapping.
PCVs are pretty safe - the worst you can do is dampen power delivery by over-fueling. But if you know what you are doing, Rapidbike has more power potential. Their customer support is also excellent.
2012 S1000RR, sapphire black, DTC and HEATED GRIPS
2014 Ducati Multistrada Granturismo
2011 Ducati Monster 796 ABS
2000 Ducati ST4 (sold)
2010 S1000RR (sold)
2007 F800S (sold)