How does State Administrative Services in Bihar differ from that in UP ?

If possible then tell about rajasthan pcs and MP pcs also .

Work pressure, or growth or promotion, or exposure, earnings or upar ka kamai, or life stlye, or scope of further study from foreign (say mba or law ), bhed bhao with pcs officer of other state at work place, life for family, or any other issue faced by these officers which i am even not aware of...