No, it's not "exactly the same." I don't think anyone really benefited from this entire shit show, but stop trying to excuse and water down what Prop 8 supporters did.
Giving money to a bad politician is not the same as giving money to support a war of pure bigotry and hatred against gay people. Perhaps you weren't there in 2008, or perhaps you weren't a target. But the Yes on Prop 8 campaign deployed deeply disturbing and hateful rhetoric that relied on the worst tropes about gay people--that they want to corrupt your children into homosexuality. All this wasn't just to pass a law, but to permanently enshrine and sacralize hatred in the California Constitution.
Here's a question: many people, perhaps you the reader, oppose Eich's forced resignation because of freedom of speech concerns. Great, I'm with you! And why I think this was all a stupid idea that doesn't benefit gay rights at all. But why are we as a society up in arms about this firing in particular? Why are we not focused on ENDA, for instance, which protects you from being fired for saying you're gay? Why aren't we outraged that workers (illegally) get fired for saying they want to unionize? Or, more tech-focused, people getting fired for shit-talking their boss on Facebook? It seems that, as usual, freedom of speech is only a concern in the media if you're a rich, straight white man.