you need to find a OMC parts site and compare parts numbers.
www.evinrude.com if you look round has the BRP OMC Cobra parts catalog
also Crowley marine dot com also has a parts catalog
If the numbers are the same they should work if not then no one can really tell for sure; I see what you are saying, the part looks identical but the part # is different by one digit.
there is a place up in Canada
http://www.sterndrive.info/
they seem to have a lot of Cobra vids on you tube, they might know if the part will work even if the #s are different.