I have both. I love my Harley - so much in fact that I can't leave it in the garage for months at a time. If there's not too much crud on the road and it's fairly dry - then I'll be out there. If the bike gets mucky - I'll wash it. Then I'll dry it with my Airforce Blaster, then I'll Pledge it or put back on the ACF spray which is a superb anticorrosion spray.
If it eventually gets rusty and rots - I'll be sorry but in the end of the day I bought it to ride it not to shine it and just look at it.
As for the Japenese bike - that live's outdoors under a Stormex - and it's still very clean; it's a durable beast of a thing. I ride it all year round - usually after 11pm at night in all conditions commuting from the airport. That said, we do not get winters over here like you all do in Canada and the mid W and Northern USA, although Brian up in Scotland mightn't agree with me