Great find, SpongeBob. I was about to reply, "These are G&P's second-tier lights, the G series"--but then I checked them out. They're G&P's top-of-the-line T series.
And Cabella's XPG series includes great prices on the miniturbo heads (6V = $20, 9V = $23, 12V = $30). They're back-ordered on the $15 9V high-pressure lamps, suggesting to me that this lamp may be the very same lamps found in the Digilight T9. Those lamps, too, are backordered. I'm beginning to think that G&P requires that different vendors state different specs.
Both heads (tactical and miniturbo) almost certainly use a plastic lens. The tailcap appears to be a reverse clickie; Digilight gives you a smooth-feeling positive clickie.
But it's nice to have options. Just think: For $63, you can now buy a G&P T9 with two heads and two lamps!