Best day for Goodwood Festival and Revival

[SamShardz]

Hi,
Sorry if someone has asked this before but I haven't been to Goodwood before and wondered which day is best to go on. It seems like the most competitive day is Sunday but if I were to go on the Saturday would I miss out on much? Want the best experience for me hd my friends.
Also which one do you guys prefer? Festival of Speed or Revival????
Any input would be greatly appreciated.