Whats the difference? In the notes for a vest that has a double cable going up the front and splitting at what, to me, looks like a v neck, it says:

"In the pattern at the "shape neck" it says:

K 17, 19, 23, 27, Cable Patt 9. Join a new ball of yarn and complete row with second ball. Cont. in pattern, making sure to keep your 2 sides separated by knitting the Left Front with the first ball of yarn and the Right Front with the second.

It should read:

K 17, 19, 23, 27work 9 sts in the cable pattern, Stop with that yarn and work up that half of the front. Attach a new ball to the other side and work the other side. Or work at the same time, keeping the split. In this way youÂll be assured that you are working the same number of rows up both sides.

You are making a split neck. Not a V-neck just a split neck."

The vest pattern is Boogie from Knitty, Spring 04. (sorry about not making it a link)