A: Pretty sure we've already got a Nasu thread brosef.

B: Depends on what you mean by "epic." If you're talking about how over the top and crazy the fights get, obviously Fate Zero wins with its Great Old Ones and F-14 vs Sumerian Airship battles. If you're talking about emotional impact, it's Fate Stay Night that wins outs. Pretty much everyone in Fate Zero is too horrible to invest much emotional interest in for my part. It's cool to get into Kiritsugu's head though.