Team Krazy i was thinking about this difference also, as i have just changed my spark plugs.
I recommend the BKR7E. But i think 7's is a little cold for winter. 6's are better suited in our conditions.
The BCP6RES-11 are good plugs if you like your power delivery to be strong and hard. But if you like smooth power delivery and purring idle BKR7E.
Overall i think its just a preference regarding power delivery, but i give the BKR7E a big thumbs up.
Perhaps the length difference of the spark plug (BCP6ES and BKR6E), does affect the coils performance. But i cant comment on any issues. But would like to hear from other members about this issue.
Just another question on this issue. When your gap from stock 1.1 goes to 0.80, i think you loose a bit of power & Strength of spark. Is there a way to keep a high ignition spark? any comments?
regards
AK