The short of it is that I would recommend going to Twist.
One of the latest crazes hitting the market are frozen yogurt bars. The biggest are FroYo and Pinkberry but I have only been to FroYo. I will use FroYo as the basis for my comparison. I personally liked the frozen yogurt and toppings (wider variety) more at Twist than FroYo.
The great thing about Twist is the layout of the topping area. There are toppings on the wall and at a two sided topping bar. This relieves the bottleneck that occurs at topping bar. It also, creates a shopping type of experience because you can browse without people stacking up behind you. No rush just the toppings you want. No hesitation about back tracking and upsetting the flow of a line.
The downside to Twist is the decor. It simply isn't up to par with other FroYo bars. It was darker than most and the modern look seemed half-assed. In addition, there was a visible pile of boxes in the back because it is being used as a makeshift storeroom.