Product Type: Hip Onahole
The vaginal hole is smooth the first 5 inches or so and then you get some noticeable stimulation, while the Petan Hip DX has bumps all around the entrance all the way to where the anal cavity connects. The inner material is also more mild than what the Petan Hip DX is made of, thus giving less stimulation. Size wise the SPDX version is smaller than the DX and somewhat more tighter while this makes the anal cavity harder to get into without your dong poking out once you start thrusting due to the entrance being placed at an angle.
Overall I am disappointed considering the higher price and the hip being made of two materials I expected an upgrade from the Petan Hip DX but this is more like a downgrade.