Any real difference between factory 340 and 360 connecting rods?

My experience with 'cheap' rods... bring 'em to a quality machine shop and, many times, they will have to rework them because the center to center length is off or the big end is too big or small. They might bolt in but they aren't usable right out of the box.

Speedmaster has a terrible reputation...

BTW... I'm looking for three bushed 340 rods to replace some damaged ones...