Considering the use of ventilated rotors in high performance racers, I believe the lack of fading and warping makes up for the slight reduction in surface area. Ventilated rotors can get rid of more heat (the main by-product of speed reduction) than plain rotors. For heavy towing, go with them. There are those who cross-drill their drums for the same reason.
Good luck
Current fleet (subject to change w/o notice) \'49 GMC 3/4-Ton , 60 Austin Healey Frog-eye Sprite (some assembly required), 2011 Dodge Avenger, 2015 Jeep Cherokee. No, they don't all run. My other ride is a (B737)no, (B767)no, A320.... Update... was Embraer E190, now Boeing B787. Knowledge is a wonderful thing, but ignorance means you don't know you can't do something.
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