I don't see any reason at all that the X2 (Lite or Pro) couldn't flash the TSOP exactly the same way as the Matrix.
As for being a no-solder TSOP flash, the pictures in the tutorial clearly show soldered connections being made, particularly to the pins on the TSOP. I guess conductive grease could be used, but that could be pretty messy and a bit hairy, in actual practice. VIAs are hard enough to hit with solder, let alone taped to the board.
Personaly, I'm not too keen on flashing the TSOP, anyway.
I'm of a mind for an X2 because of the larger BIOS capability, and the Lite in particular because of the 2x512k multi-BIOS.