Another impeller question

[Brianw]

Hey guys I’ve searched impellers for my boat, 2015 Z3 orange top, and came up with this number. Johnson 09-812B impeller. Now the problem is, I’ve seen it advertised as this Johnson 09-812B-1 impeller. See the difference? I’m just looking for clarification or is it the same part or am I way off?
Thanks everyone
Stay safe

[lee]

Same part