Option 1) if you hurl someone it's their silhouette that determines the damage they take

Option 2) hurl damage is based on the maximum silhouette allowed by their purchased ranks of the strength upgrade for the move power

Option 1. The size of the object being hurled is what determines the base damage. you don't get to treat a stormtrooper like a Silhouette 4 ship just because you have enough upgrades to boost it that high.

All the upgrades do is ALLOW you to move something up to that silhouette in the first place