Q. Which one is best Apache rtr 1604v or new pulsar twin disc?

Pulsar twin disc is better than Pulsar. Flawless riding can only be with pulsar. You will enjoy riding with pulsar only. otherwise apache is also good but in comparision with pulsar. pulsar is better than apache.

Apache rtr 160 4v comes with a more cc powerful engine. So no comparison with pulsar 150.

Apache feels mpre premium but it is mpre expensive also, if you are very much tight on budget go for pulsar but of you can afford apache don't think twice go for apache.