For durable reasons I'd pick the slots over the holes any day. That being said all four of the race car rotors are drilled. But I know that and pay attention to them.
The slot shown doesn't seem to me to offer and advantage over about a dozen other formats I have on file. *gotta add one more!
There are a number of patterns and designs that all claim to be the best or better than others. This way, that way, this design, those dimples yada-yada. One that did come to mind as both odd and worth a look is the factory Wilwood pattern that is no symetrical. This limiting harmonics at say 30 degree increments. Even by their own comments this is of minimal value to the average consumer under 150mph...
If I could find a way I'd really love to post all the patterns I have on file. I need to find a hosting site to put them into. It's really kinda funny.
I'll agree with RARA too but always point out that I know of no rotor that is truly relieved on all four sides. Most get two and thats the best you get.
