Oh mannnnn. I'll have to check up on that MacGregor/Kenyon cover blurb thing. I hope like hell it's tongue-in-cheek or some stupid publishing stunt she had nothing to do with. It used to irk me to no end that she would push her MacGregor books *in* her Kenyon books (i.e., her characters would have them on their shelves or be reading one or be given one to read when being held captive...) and she only *just* stopped doing that and started plugging other authors instead (Jim Butcher), which is just fine with me.

As for your intended topic, I can say I don't think MacGregor/Kenyon have different voices at all. I do think Roberts/Robb do, but I think this is more of a function of Robb being the one long storyline and the Roberts having a finite end; if I thought about it longer, I'd probably see that their writing style is similar enough that if I didn't know they were the same author already, I might guess.

:-)