Which band is equivalent to senior manager in IBM

What could be the salary range for 9 yoe in C++ at @ibm? What could be an appropriate band? Highest education: Mtech

I have 2 offers

IBM 17.4 fixed

Cognizant - 18.5 including variable

Yoe - 5

Tech stack - GCP Data Engineer

Please let me know which to join my joining is on November 20

So kindly provide some inputs

@all