Not really, nobody 'wins' in a collision, just like nobody 'wins' in a headbutt. Also, with that truck frame, crumple zones misalligned with the other cars (think of tissue smacking tissue vs tissue smacking brick), high center of gravity, and a 30-40 foot longer stopping distance, you pay a lot for more mass.
You also forget, you're not always hitting a smartcar; what if you hit another Suburban? When that happens, the combined kintetic energy of the monsters causes them to take much more damage than cars that were about the same weight as each other.
Not only that, but SUV's are a heck of a lot tougher to maneuver, which makes a crash more likely. The perceived safety of a large frame is hardwired into our brains. In fact, the high hip point causes us to feel dominant, as we are looking down on many other vehicles. This means that we will be more aggressive, leading to the conclusion that increased perceived safety diminishes actual safety.
Think of it this way: if I told you that I had coated your car with nitroglycerin (explodes upon rough handling), you would drive very carefully, and have a low chance of an accident. You would do that even if it wasn't true, if you believe what I was saying. However, if I said that I had given your car energy shields and that you were truly invincible, you would drive like a derranged maniac, killing many other drivers. You'd find out the hard way however, that that wasn't true, and you end up rolled over bleeding out in a ditch.
This is rather extreme, but it serves to prove a point: the safer you feel, the more risks you take; the less safe you feel, the fewer risks you take.
-Penguin