Mixing different hard drive model/firmware versions (same spare number) in a server/array

Hello,

Is it okay to use these drives together?

BF036863B5 HPB3

and

BF0368A4CA HPB5

I realize they are the same spare number (289241-001) and have been advised by the supplier that they are functionally identical and compatible but wanted to get verification from HP on this.

Thanks!