it's worth pointing out that this was a twin Comanche - I.e. had two engines. Twin engined aircraft have significantly higher stall speeds than singles. This is mainly a matter of certification requirements for single engined aircraft, the details of which probably aren't of interest here, but the higher stall speed means a significantly increased amount of energy to be dissipated on impact, and therefore a much higher risk of injury.

This is of course in theory mitigated by the lower risk of a forced landing due to having a second power plant. All bets are off however if both engines quit on you.

it's also possible that the impact was worse than it needed to be because a forced landing in that aircraft may not have been something the pilot had practiced or considered. After all, it had two engines.

I don't have any statistics but my understanding is that per flight hour, accidents in twins are rarer than in singles but involve a higher chance of a fatality.