I wish I know but I can't get that information out of Samsung. Every time I bring up Plasma tech, they shoot it down as if they are only interested in LCDs. Even during tech briefs, they failed to include PDP. But the way the panel is driven is different to Panasonic that much I know. As you know, Samsung plasmas are significantly brighter and have different motion signature to Panasonic.
PS: I haven’t had the time to dig around recently. Hopefully you're more successful.
PPS: On a slightly off topic, I have feeling Samsung may take the lead in PDP tech very soon. After all, they have everything nailed except for the black level, which isn't that far off.