Honda Accord Euro CU2 NGK Spark Plugs

[caudex]

Hi all.
I've discovered that NGK makes 2 spark plugs which is compatible with Honda Accord Euro CU2. They both seem to be Laser Iridium, but not sure whats the real difference other than model numbers:
ILKAR7K11S
ILZKR7B11GS

any ideas?

EDIT: ..... Nevermind..... the correct one should be ILZKR7B11GS.... the website i was using was defective.

thanks