Owens Corning Woodcrest Application

The Woodcrest application requires cutting the rake edge shingles to what they call a 5" & 5" or a 5" & 15" offset. The 5" & 15" offset requires one less cut per offset pattern than the 5" & 5" offset, but is there any reason to choose one pattern over the other? Would there be a discernable difference in the look between the patterns? Thanks for any advice.