Which of these strings are the softest?
Experts feel a bit more slick, kitty it depends which type you’re talking about. Same with candy wires.
Which types are you looking at?
Just looking for the softest bulk string to try out 
Personally.
I’d say. Normal kitty. Or YYE Expert string.
But I’ve never tried candywires
I just got a fifty pack of green Expert Strings. They are definitely better than the generic bulk I was using. I have been playing one for awhile now and it still feels new. It holds tension well too.
As for its softness, well, it isn’t exactly soft. More along the lines of slick, like aznnboyaZ said. For instance, I don’t get string burn, and on a trick like Gondola, the strings just slide across each other with ease.
I hated the expert strings. I mean to the point where I refused to use them. They felt really weird and were loosely twisted so they never held tension well. The only thing I liked about them was the plastic container they came in.
I’ve tried all. Candy Wires Soft type (Type S i guess…?)
By far the softest.
Why not BYYS Candy String those are fantastic 
Haha
100 Bulk Fat Kitty String = Pillow O3O
Candy wire type s is the softest that you mentioned, they just don’t last very long at all., i liked type e more. Expert is very soft as well and slick and thin. Kitty is a little less soft and slick in my experience.
S-type Candywires