You have been talking to the wrong people and in the future you need to take their advice with a grain of salt, both are worth about the same amount.
Read the factory directions on break-in and also go to this sight
http://saito-engines.info/
OS and Saito engines are both powerfull and equally reliable when properly tuned.
There is enough posting on this sight about breaking in an engine that I doubt you could read it all in two nights-just do a search.
Fred