Well said. A plague on both houses. They will use us when it suits there purposes and cast us aside when it doesn't. Anyone who believes otherwise is fooling themselves.
Well, it's not true that there are no differences: there are important differences, and you have only to inspect the agenda of Hildebeast's claque to see that.
However, your last point, which old radical David Horowitz has been pushing for years, has a lot of validity. There is a big game of cross-ownership, of political zaibatsu and zaiteku going on -- to borrow a couple of terms for it from the Japanese.
Just as in Japan it is misleading to think of the great companies as representing divergent interests rather than facets of the same Interest, in America it is misleading to think that one political party is the "party of business", when business interests have compromised both parties assiduously for 20, 30, 40 years now by spreading their money and hedging their bets.
Given the drift toward corporate ownership of America, yesterday's Court laugher was inevitable. The Court doesn't just read election returns -- they know who owns what!