All three bikes you've shortlisted are quite different to one another, so the bike you should choose entirely depends on your riding style and intended purpose.
The Triumph Speed T4 has the most relaxed and effortless riding experience with its torquey engine and upright, neutral ergonomics. The KTM 390 Duke is its polar opposite, with its peaky single-cylinder engine dishing out the most power, and its chassis will be superb if you intend to do a lot of twisty road riding. Do bear in mind that its suspension is on the stiffer side, which will be felt when going over road imperfections. Lastly, the Bajaj Pulsar NS400Z splits the difference between the two in terms of power, features and handling and is also the most affordable bike you've shortlisted. We recommend taking a test ride of the bikes you've shortlisted before making a decision.
