You'll find a lot of help at the Knowledge base section before you enter the forums.
Cutting performance wise (in an overly simplified manner), from best to "worst", hollow grind -> flat grind -> sabre grind
Hollow grind initially keep the least metal behind the edge, making it cut very easily, provided that you're not cutting deep into the material, cause it widens disproportionally. It's more prone to damage because there's less metal to back the edge.
Flat grind has the advantage of a good cutting edge but also having a decent amount of metal behind it.
Sabre grind is kinda like a flat grind, but it doesn't grind right back to the spine, but like 1/2 way or some spot. It's tougher because it has more metal behind it, but it makes a deeper wedge and doesn't cut as easily as a flat grind.
HTH and check out Joe Talmadge's (sp) FAQs in the Knowledge base, and use the search function to help you get the pictures you need.