Well, I suppose it's all a matter of perspective. Sure, none of them will implement radically progressive economic policies, they will indeed serve corporate interests and the PIC. From this regard, they can be deemed relatively similar, especially when you confront them with options that would be possible but are not championed by either (ex : universal healthcare). From other points of view, they have marked differences (ex : LGBT rights). In the end, although they can't be called the same, and the difference between them can mean life or death for people, I suppose we could say none of them display a strong commitment to emancipation and undying tries to corporate interests.