Did anyone survive, or could anyone have survived the attack on the bus in "The Ghost Network"?

In Fringe S1E3, "The Ghost Network", we see an attack on a bus which leaves the people on it trapped in a substance not unlike what we later get to know as Amber 31422.

In S3E5, "Amber 31422", we learn that while people trapped in amber are officially pronounced dead, they actually aren't.

In S3E14, "6B", we see some of the victims of the attack on the bus, still trapped in amber.

So was the amber used in the attack actually Amber 31422, and could the victims have been saved, or was it just an amber-like substance?