Hmm, now that's all very strange.
Haven't you checked the DVD Beaver link? Runtimes of the MGM DVD and the new Lorber Blu are about 106 min. The uncut German Blu runs also about 106 min. European Pal DVDs of Sabata run about 102 min. Again, I'm very sure all contain the same version.
Your runtimes for GBU are also wrong. The 2004 disc runs about 178 min, and contains more than 4 new scenes compared to the US theatrical version, which runs 161 min.