by Jing » Aug 17th, '11, 13:33
It's just marketing.
For example with 13 Steps.
No-one is going to put out a routine, and say, 'if you prefer, this is also round in 13 Steps'
They just market it as new, you buy it, and later find out you've been duped - or have you? because if you passed it by in 13 Steps the first time, maybe you would have missed it a second time too. The new routine, might help you to see the potential of the effect.