DL650 V-Strom (aka Wee Strom) is a sibling to the SV650, but with a very different role.
It is an adventure touring bike. It sits perfectly upright with plenty of wind protection, and dirt capable suspenion and tires. It is meant for touring about and travelling down the roads less travelled. It is tall and very top heavy (it has a 5.5gal gas tank!).
The engine is also detuned for a less stressed engine to prolong life in rougher riding conditions.
The SV650 is much lower and much sportier. It is the “civilized” of the two. If you plan on spending time on dirt roads, the Strom is the a good bike. If you never plan on seeing dirt, then you’ll want to swap out the stock tires right away.
If you are interested in a canyon carver, or other fun bike without much plans for exploring (either long distance on the roads, or just down the little town side roads that inevitably turn to dirt) the SV650 is the bike designed for you. If long distances (as in multi-day trips) or adventures away from perfectly smooth asphalt and clear cellphone reception is your plan, the V-Strom is probably a better choice.
“The two seconds between ‘Oh S**!’ and the crash isn’t a lot of practice time.”