I like when the man in a sex scene is well endowed, but I'm not turned on looking at pictures of just nude guys. I've also never had the desire to watch a guy on cam or masturbate with another guy. My interest in big dicks is focused on how they affect women, and its interesting that while talking to women about it is arousing for me, talking to men is not. I know that some from the "everyone is bi" worldview won't accept that, and I have had a couple guys in the chat room claim that mutual masturbation isn't gay probably to make me feel comfortable with the idea, but it just isn't something I think about. And I would know.
I will say that if camming with other guys is your thing that's great, I'm not judging. But yes there is a difference, and from self-observation it's a difference of kind, not degree.