Jheri Natural Protein or Aphogee?

[Leshia]

Hey ladies, is the Jheri Rhedding Natural Protein as "hardcore" as the Aphogee? I've recently went jet black (from blonde) and for some reason, it's just starting to break -- go figure! Hair was just fine stripped and bleached beyond recognition. Go black and it's unhappy and breaking. I know it's not a moisture thing because my hair's unbelievably soft and I use a plastic cap every night. I need some strength back in it...