Is a 1000cc V-Twin engine better than an in-line 4 cycliner of the same cc?
Not necessarily. They are different. The V-twin has more torque, the 4-cyl. works more on horsepower. The V-twin might vibrate more, though these days they have a lot of tricks to smooth out v-twins. But the vibration of a twin is lower-frequency than a 4, and is less objectionable. The 4 might be smoother but what vibration there is is ‘buzzy’ and makes your hands numb. The v-twin is simpler, less stuff to go wrong, easier to adjust valves or whatever. The 4 is more sophisticated, has some advantages, like a wider power band (depending on how it’s designed of course).