KJM has much better connectivity: Cabs, public transport, short distance away from metro. For those going to offices directly, it is closer . Also Whitefield stop is also good. Banaswadi is a small station with very poor connectivity. I think SWR is merely using it as a parking point since Bypanahalli cannot accommodate 20 coaches. Eventually BYPL could be the the main terminus where trains coming from Chennai, Jolarpettai, KL side could be terminated