I would give Dave a ring and ask him why he chooses the E88 for his turbo builds. When I was looking for a reputable L6 builder, Rebello's name kept showing up in all my searchs, so I gave him a call.
I don't remember what all the reasons were for his opinions on using the E88 for a stroker turbo motor, so thats why you should get ahold of him.
He's a very nice person to speak with, and would answer this question for you I'm sure.
I'm not picking one head over another, saying either is better, its just he recomended the E88, with his turbo port, and larger valves to me, and thats the choice I made.
I use the 1mm HKS gasket, and get a 8.5 to 1 comp ratio, which gives great off boost throtle responce on 93 oct gas.....
Try this email address, its the last one I had for Rebello;
DReb993524@aol.com