First of all, the main distinguishing factor between Pulsar 150
and Pulsar 135 is the cost.
Pulsar 150, as the name says, 150cc has more power, pick up and
speed when compared to Pulsar 135.
But, pulsar 135 has also got the equivalent features of Pulsar
150. (Because of the latest technology)
In a nutshell, Pulsar 135 is a lite version of Pulsar 150.
And, my opinion, Pulsar 150 is better...