The grip preference is just personal. I think, again my opinion, a straight grip is more dependent on your control of the forend when mounting, where it's easier to go from single hand carry to shooting when the position of the stock hand is kept in place by the grip.

Now yesterday I may have proved this theory wrong and after shooting about 50% for much of the season I wiffed on 5 birds...

"Not all who wander are Lost"
-Hoppie 14'