Surfing Waves

Quick question, looking for my first shorter board and would like some input as to which would be easier to duck dive.
Im looking at a Webber `The One`: 6`4, 20 1/4, 2 3/4 . and a Webber `Afterburner`: 6`7, 19 3/4, 2 5/8
Basically will the longer board with less volume be easier to dive than the shorter board with a larger volume. Im assuming the longer will be easier but I may be totaly wront (normally am)

Thanks!

Probably wouldn't be TOO much of a difference. The more important question is which design fits your style and waves.