Use the OEM plug. I have seen the use of other plugs cause high rpm "issues". Wierd running, popping, bogging, etc. I always recommend the use of OEM plugs on 2 cycle engines. 2 cycle engines can turn 12k to 14k rpm, and the manufacturer test the OEM plug extensively.
On 4 stroke power equipment, I don't think it matters much, and I pretty much go Champion as they are cheap, made in America, and high quality, and I have never had a problem that I can remember with them.