Is Odmire entrance a pitch, then? If so, how deep and is it likely to become impassable in flood?
From langcliffe's (the person, that is) description, it sounds as though Odmire is the easier option. My recollection of Langcliffe is that there was a fair bit of crawling before it got bigger and even after that it is all pretty dark and dismal (also wet and cold). It's a good cave mind, although lugging diving bottles around and then having to race out with the water rising doesn't really help you appreciate the finer points.
I guess it all depends what you are looking for when you say you are wondering if it is any better.