Montra Trance is a good bike for the city use and does not have a fancy price tag., also price is below Rs.16,000/-. According to me it is better than Btwin.
I'm riding Btwin Riverside 3 since 29 Dec 2014 at least 5 to 6 days a week for a similar distance. Its been good so far. Recently, I'm little confused about maintaining its PSI on tyres which I'm trying to sort out.
Riverside is very good bike, infact all btwin bikes are total value for money.