How do flooding treatments differ from systematic desensitization?

The difference between Flooding treatments and Systematic Desensitization is that, Flooding is a procedure of behavior therapy established on the ideologies of respondent conditioning, it is a known psychotherapeutic method to overcome different phobias, it is a faster method in overcoming fears, than Systematic Desensitization. Systematic Desensitization is the behavioral treatment, which combines imagining or experiencing one’s fear or feared object or situation together with relaxation exercises to overcome these so-called phobias or fears, but this method is a little slower than Flooding.