Which one to buy between Thunderbirtd TBTS 500 or KTM Duke 390?

I am a working proffessional and i work in Delhi. I currently ride on Honda Activa at my office but now i would like to change my taste of biking and willing to buy a powerful bike which makes a thrill among my official colleagues.

So, after a huge research i came to know that there are two bike which are reasonable for me and there names are Bullet Thunderbird TBTS 500 and the other one is named at KTM Duke 390. Both the bikes are really awesome but i would like to know which one is better among these two.

Please help as to choose which one among these two bikes.