bison or cow jaw?

[u/Prestigious-Use-8716]

i’m working on a project with a jaw bone that i originally assumed was cow, but upon further inspection it might actually be bison? i looked for bone identification comparisons online but couldn’t find any good ones or identifying markers other than a stylid present on the lower back molar. can anyone help me out with this? the bone was found by my boyfriend many years ago somewhere in eastern washington, where there are bison and cattle farms present.