How can anyone say Zenyatta is better than Rachel Alexandra when Rachels last speed figure is 4 lengths better?

I love zenyatta she's a wonderful horse I wasn't sure what I thought about Rachel I knew she was the best 3 year old filly but I am a devoted zenyatta lover but after seeing rachel in the Haskell I can now say she's for real and it's such a shame because Zenyatta deserves horse of the year too but i don't think she'll get it now if only Rachel had come around next year Zenyatta won today in the eighth at delmar two wonderful girls and I like them both