Is bigger better? Prop question.

[RandyAB]

I?m about to order my HRT series 3 bladed WW prop. My engine configuration is right at the borderline between the 375 and the 378 which has a slightly greater diameter. With my limited knowledge, I don?t really know how to choose between the two. Aside from slightly better ground clearance with the small diameter prop, is there?s my other benefits to the smaller one? Most importantly, am I giving anything up with respect to performance? I?m thinking that the larger diameter may be a touch smoother. I am leaning toward the smaller one though. I?d love some education on this.