How is marketo different from Eloqua?

In terms of Deliverability?

I have heard mixed reviews of their workflow diagram interface. Some love it, some find it odd. I haven't used it myself since a demo 3 years ago though.

You might try g2crowd.com and LinkedIn as better communities to tap for this info.

Haha yeah this isn't exactly an unbiased group of marketing automation users. Go Marketo! That said, there is a group called Marketing Automation Experts that may be a good reference.

very broad questions. all depends what you are looking for.