thomas,
the agitator softner dispenser is usable in USA for 2 reasons:
first, as our friend above said is cheaper,
and second, as theyr softner is too liquid, the agitator dispenser works fine.... here in brazil it doens't work couse our softner is too viscous and doesn't drain properly to the clothes, mainly in low whater levels, letting the interior of the agitator so dirt, cousing stains in the clothes!!!