I wouldn't get too excited over either one of these charts. They really should be in SAE to do a apples vs apples comparison. Or at least back-to-back on the same dyno/day/conditions/etc.
Too, the second chart appears to be little more than just marketing cheese from Orient Express (who, coincidently enough, sells TiForce systems, among others. Who'da thought?
).
A 25 hp gain with pipes & PC, is it? Shyeah, okay.
Even if it's a 15.5hp gain, even that would be pretty magical. I guess anything is possible if you tweak your settings enough to get the graph results you want.
Bottom line is that both of these systems are excellent. Both are among the best you can get. The TiForce welds are to die for.