Flashing the tsop is completely replacing the current bios in the xbox with hacked ones, which is what a modchip does by forcing the xbox to boot off modded harware. But the bios are in your xbox insteda of the chip.
The downside is that there is no disable switch (unless you put one on yourself, but I have never seen a tutorial on how to put dual bios on your xbox). This pretty much crushes going on XBL.
The upside is that you don't need a modchip
