Matter of taste, preference and price.

Some people would say there's no point in going w/a 195-55-15 when the 205-50-15 is more rubber on the road, and the same price or cheaper.

Some people would say there's no point in going w/a 195-50-15 because it's a lower load rating and (perhaps, some would say) not quite as safe and up to high performance driving.



All personal preference.

Personally, I'd go with 205-50-15.