4 series for a release on the 4th, it seems like they are taking a note out of the computer marketing handbook.
Also from the details for the competition signup,
THE GRAND PRIZE consist of a Tektronix oscilloscope (ARV US $35,370)
THE FIRST PRIZE consist of a Tektronix oscilloscope (ARV US $23,000)
They imply that these are two of the new scope series, so fully optioned and maybe missing a couple of channels for the second one?