The Buddy Holly Story is a well done biographical drama given life by an Oscar-worthy performance from none other than Gary Busey (yeah, there was a time when he wasn’t completely nuts). The direction and pacing was also fine-tuned making for a nice drama.
Piranha DD is more or less a SyFy Original Movie with nudity. The story, such as there is, is pretty thin (not surprising, though) but the dagger in this movie is unlike its predecessor, it’s not much fun to watch. I’ll give credit to Danielle Panabaker for trying her best and even the director for attempting to bring back the 1970s monster slasher genre, but for me, I just didn’t find this to have any redeeming value, even in the genre.