I read your comparison and had to chuckle as some of the points of distinction you mentioned were what my granddaughter, who was 8 when we began our quest for a Z3 rather than a Z4, put forth but in 8 year olds terms. Also the Z4 didn't fit the requirement of being 15 yrs old minimum for import but she much preferred the Z3. As the saying goes " out of the mouthes of babes, truths shall come" seems to be true. JIM