Thank you for your question! They have similar design and features but differ in appearance and in spray settings. The 58581-PK has the following spray settings: H2OKinetic spray, Full Body spray, Full Spray with Massage, Massaging spray, and Pause. The model 58580-PK has Full Body Spray, Full Spray With Massage, Massaging Spray, Shampoo Rinsing Spray, and Pause.
Best regards, Jon
Date published: 2018-10-09