Ok, that makes more sense. Here's the deal:
Microformats, including hrecipe, do NOT weight SEO results at all in Google. There is zero SEO benefit to using microformats. Don't believe me, check Google for yourself, they say so *explicitly.*
The benefit is increasing click through from search results. And that is a very big benefit indeed, and well worth using whichever recipe plugin you prefer.
The recipress plugin differs from hrecipe plugin by offering a fully featured (so said) recipe publication system. hrecipe plugin is far simpler, adding a microformatted recipe to any blog post or page.
These plugins serve different markets.
Which you choose to use depends on your needs.