Are there any certain cars that are less safe than other cars?

Definitively. Small cars are not as safe as large cars, generally speaking. Cars like the Toyota Yaris, Nissan Versa, Mercury Grand Marquis, Hyundai Accent, Ford Mustang Convertible, and the Chevy Aveo Sedan are listed by Consumer Reports as not being as safe as they could be. Volvos are safe and sexy