What is the difference between texturzier and a perm?

A texturizer is a mild relaxer but a relaxer nonetheless. The only difference between the two is the amount of time left on the head. Where as you'd leave a relaxer on for 20 minutes, you usually leave texturizers on for about 5 to 10 minutes, depending on your hair texture. Texturizers are supposed to make the hair more "manageable", which is also debatable.

Texturizers are usually used to loosen the hair's natural curl pattern. Texturizers will NOT give your hair a curl pattern it doesn't naturally have. Some debate that texturizers are healthier for your hair than relaxers.