Modern Buddy

I ordered some new spark plugs from Scooterworks recently for a Buddy 50 and they sent me NGK B6HS 7534 instead of the usual BP7HS 5111. They look almost identical. The tip is not as elongated on the B6HS as it is on the BP7HS. Scooter runs with the B6HS in it. Should I use them though ???

I'd give Scooterworks a call and ask them to find out for sure. Could be it was sent in error.