dont you think that all overdrives just sound the same??
all these are just marketing stuff to get you to spend your hard earned money on basically the same ciruits.
This has been mentioned a good many times before in other places, but while the pedals themselves will always make a guitar sound like a guitar in the end, from a player's perspective, a pedal is chosen not for the way it sounds, but also the way it feels under the guitarist's fingers. The Shredhead for example provides a more "liquid" gain that facilitates lead playing. The Boss DS-1 and the Satchurator do not do that based on experience.
You have a point though, and so I recommend that musicians who play for a living (or take the whole thing seriously) at least be aware of how their equipment work.
BTT: I have two favorite overdrive pedals. The first is an MI Audio Tube Zone, which I use mainly as a distortion/metal pedal. It is more than capable of low gain TS-type boosting, as well as treble boost/fuzz type tones.
My other favorite is the Paul Cochrane Timmy and derivatives (Danelectro Transparent Overdrive V1, Lovepedal Amp 11). This pedal is similar to the Tubescreamer in terms of circuit design, but has separate bass and treble controls, more gain range, and more volume. You can go anywhere from SRV to Yngwie with the pedal and the correct amp/guitar combo - it's that versatile. In fact I encourage every beginner guitar player looking for an all-in one overdrive to skip the Ibanez Tubescreamer or DOD250 altogether and go straight for the Timmy.