nothing, the difference between this plug and a rj19lm is minimal, but it has an extended electrode and a wide gap .040 instead of .030. You could theoretically use a 19lm with little issue but I wouldn't recommend it.
The Champion number is a RJ2YLE. Somewhat hard to find if your not a dealer.
What is the cross reference of BPR5ES to Champion Champion RN11YC
Most all brand spark plug brands are on the cross reference including Champion. Some of the brands that cross reference to Champion are Autolite and Denso,
8902 cross reference plug
Champion RZ7C
The laser 40500 Champion cross reference is for spark plugs. There are many cross reference data bases to show which spark plugs can be interchangeable.
check specs
There is no Champion spark plug with the part number 696798. There is a Briggs and Stratton part number 696798 that does cross reference with a Champion RJ 19LM.
The Champion part number is {| |- | QCJ8Y |}
Champion J19LM
YES
Brp6hs