Fan question (UPDATE: Nevermind keep scrolling lol)

I’m getting ready to put my 360 LA back together after a front end tear down to do the water pump and timing set. The fan on the left is the one that was on the (relatively new to me) car. The one on the right has one more blade (came off a ‘67 273) and will fit. Seems to me 6 blades are better than 5, but what do I know. Any advantage to either one? Thanks.
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