Don't know anything about SSR products but always use the least aggresive product that will do the job and you can't tell until you try as every car is different in terms of paint hardness. Also, assuming you are applying this by machine, different pads work differently with different products, so a harder stiffer pad may out peform a more aggresive product with a soft smoother pad but you the smoother pad may provide a better finish. I know people on here have a favorite product/pad/buffer combo that happens to work on every car they do but it's not that easy.