The types of injuries that result from a collision between a large commercial truck and a passenger car vs a collision between a passenger car and another passenger car are one of the most important distinctions. Almost usually, a commercial vehicle collision results in serious injuries or even fatalities.
A passenger car can be entirely destroyed by a truck due to its immense size and weight, which can cause parts to fall out and shards of metal to shatter.
Being struck by a semi-truck might result in extremely significant injuries even if the accident happens at a modest speed.