between the old addi and the new you can not really see any difference! same shape, same taper. if i had some hi quality engineering cailpers maybe we could detect where the change has been made.
knit picks needle still has a better tapered sharp tip in comparison.
the biggest difference between the knit picks and addi lace besides brass versus nicke,l is that the size is printed on the cord for the addi lace turbo. Addi is ofcourse lifetime guaranteed. but any issues i have had with my knit picks needles, have beem solved or replaced at no cost to me. so i would consider knit picks needles to be unofficially gauranteed also.
the price comaprison:
addi turbo original $12.80
addi lace turbo $14.99
knit picks classic circular $4.99
in the future i do not for see buying any more. i dont see a marked improvement to justify the $10 difference. i would rather spend the $10 on yarn. So did Skacel really listen to its public and change anything or was this just a marketing ploy to boost needle sales......
i am going to check the US size 6 differnces/similarities and i will let you know what i find out.