They do have many options, especially if you want really low friction.
Personally, my QCK heavy (which is a bit faster than a standard QCK), had too little control. The glide was nice, but stopping power was lacking.
That said, the Otsu feels just as fast as the QCK heavy, with a little rougher glide, and a little more stopping power. It's a great combination. If you want something as fast as a true hardpad, then there are options, but I haven't used a hard pad in 10 years, so I don't know what to recommend
As for the foam. I have a G-SR at work, so I can compare. The xsoft is noticeably softer than my G-SR, and a bit softer than my QCK heavy. This is why I went with the 'soft' this time around. I think it depends more on your mouse feet...if you have small mouse feet, then the xsoft might be too soft--I think it is for me.
EDIT: Also the softness depends on how you hold your mouse. Personally, I rest very little weight on my mouse because my hands are huge (all my hand's weight is on my wrist) and (2) I use a fingertip grip. With that, I feel that the xsoft is too soft for me because I feel my hand compress the pad too much.