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The page shows 2-25,000 on the frequency response. AT usually requires a nice difference before they do this. The CKS50/70 are both rated to 24,000. These should have better treble extension. A bit of tuning can be done with tips and 2 position system.
Oooh, button magnets so they stick together

! Should come in handy to eliminate tangling. A leather case is nice also.
Seems like a must have. Put me down for one! The red are listed at the same price. I'll go for the red but I predict resellers might try to get a few more bucks for the "LTD". Hopefully they are the same price. The color of the LTD looks a more dark garnet like red than purplish to me.