2006 or 2007

[lucky7]

for about the same money i can get a 2006 sx 19.5 anniversary package with a factory tower, or a 2007 with out a tower. the 2007 has the swim platform, th 06 doesnot. both are new, 0 hours. the 06 is mercruiser, the o7 is volvo, both 5.0s i have heard volvos are smoother, are there any other differences between these boats? any input apreceated.