Green4life is right. 18/6 will give you better results because the plant is meant to be grown outside, and naturally it would get a dark cycle.

Although, saying that, i put mine lights on 24/0 for the first week, then as the first set of 5 fingered leaves come out i stick it on 18/6.

To answer your Q plants will grow quicker, and therefore, 18/6 is beats 24/0 for most cases.