1. Yamaha R15. :
Pros : Best handling and brakes, Good looks (fully faired), Good power for a 150cc mil (lacks the low end punch that 200ns/duke/cbr250r has), Engine reliability, Technology, Renowned delta box frame,Rev happy engine, Yamaha Service, Dual horns ,Fuel injection
Cons : Pillion comfort absent, Only 17bhp (good for 150cc though)(less if compared to 200ns/duke/cbr250r/150r), seating position not suitable for touring (matter of getting used to it), Battery 3.5A, Costly
2. Bajaj Pulsar 200NS :
Pros: New engine, Good on mileage being 200cc, Looks good if you are more of a naked bike lover, Powerful, Technology derived from KTM, Comfortable for pillion as well, 23bhp(pull from standstill is mind blowing), Renowned perimeter frame, Good handling (takes curves nicely), Price, Bajaj Service
Cons : Vibrations at speeds post 115kmph (which will be a problem in every naked bike, but who cares coz in India we hardly go above 100kmph) (can be sorted out by some tuning), Rear tyre tends to skid (can be replaced by a new sticky one), Carb (when compared to FI bikes you have listed)
Cant say about reliability as it in a fairly new bike. But my gut feeling says if maintained properly, it can serve well.
3. CBR 150 :
Pros : Handling and Braking can be compared to R15, More horses compared to any other 150cc bike in India, Very Comfortable for touring as well as city riding (incl pillion), Much more rev happy motor than r15 (DOHC as compared to SOHC in r15), Honda Engine/durability, Better fuel efficiency, CBR250r alike looks, Fresh colours, Honda service, Renowned Twin Tube Diamond frame, Fuel Injection
Cons: Torque is pretty poor , Switches used like the ones used in twister, No pass light switch(atleast I prefer having it), No engine kill switch( again a point of debate coz its needed just for safety), inferior plastic quality.
If you are considering a cbr150r which costs more than R15, then better take a look at the KTM Duke 200, its a monster.
I was considering the duke but I had love for r15 from the day it launched, so went ahead with it.
In the end its upto you, whether you need a comfortable bike or a powerful bike or a sexy bike. Depending upon the requirements you can zero down to your choice.