What kind of RG is it? If it's a 550 with a pickguard, I would mount them in the pickguard. Asthetically, I don't like pickup rings on superstrats so, if it was a 570 I would direct mount them, unless it already has rings, then it's got the holes anyway.
Sonically, it doesn't make a ton of difference (IMO, I know there will be disagreement). One of the arguments I hear for direct mounting is that it give better bass response, but in an old article with Steve, he said they decided to mount JEMs pickups to a pickguard because after trying multiple ways of mounting, he thought he got more bass when they were pickguard mounted.
$0.02,
Roger
Sonically, it doesn't make a ton of difference (IMO, I know there will be disagreement). One of the arguments I hear for direct mounting is that it give better bass response, but in an old article with Steve, he said they decided to mount JEMs pickups to a pickguard because after trying multiple ways of mounting, he thought he got more bass when they were pickguard mounted.
$0.02,
Roger