^^
Yes, I'd say the Bogner blue is somewhat lower gain. The "plexi" mode is a VERY slight breakup and the "blue" mode is a bit more. I'd say more than what a ts808 will give you but certainly not a higher gain pedal. I think the amount of gain is just right for my taste, especially if your amp has a puss hair of gain and or you stick a moderately gained up tube screamer before it. The Variac setting drops the volume but give a squishier distortion tone, it's good but I prefer the Blue mode setting with variac Off.
I have absolutely no advice to give on the red pedal but from the official Bogner videos it has more gain. I got mine at guitar center, they seem to stock both red and blue; at least the 2 near me do/did. Actually even the uberschall doesn't sound bad from the Bogner channel YouTube demo. You'd automatically assume its a face melter but it can do a less gain tone.
Other thing is the boost feature. It ACTUALLY WORKS! Most pedals with a "boost" don't seem to do much. These have 2 small trip pots thru the top of the casing that allow you to set the boost volume and added gain. Pretty cool.
Really sorry I/we may have hijacked your original thread!
EDIT: just wanted to add that while the blue pedal can and is lower gain, due to the dynamic ability it posseses, should you pick more aggressively; you'll have more hair on your tone. So that is something to keep in mind and consider. I think with the red, along with more gain also comes a more modern sound. At least from what I can discern. It wouldn't make sense for them to put out 2 pedals with the same overall tone, just added gain on one.