Pinot also has dozens and dozens of different clones. Virtually all Pinots are blends of various clones which results in very different wines. Pinot was one of the first (may be first) varieties to recognize, develop and endorse clonal differences.
This link is good. It's a complicated subject. I'm far from an expert...
A Wine Geek's Guide to Pinot Noir Clones Around the World
This link is good. It's a complicated subject. I'm far from an expert...
A Wine Geek's Guide to Pinot Noir Clones Around the World