It depends. Which has biggest diameter, size of blades, and steepest
pitch of blades? Assuming all those are the same, and the
blade-to-ceiling distance is the same, a 5-blade would. I haven't
noticed a 4-blade fan in use or in the stores, in years. (Not that I
have looked real hard, mind you. The question never came up for me.)
Hunter still has 4 blade models, mostly smaller and specialty uses,
like kids' rooms.
Yeah, I don't know if they're hunters, but HD has $19.95 hugger ceiling
fans, and indeed with 4 blades.
With a lite kit! Not bad.
Problem is, if you happen to touch the blades while spinning, the cast "arm"
that attaches the blade to the hub cracks *immediately*, and appears
near-impossible to fix. <sigh>
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