Spaten Optimator replaced Franziskaner Hefe. Optimator is an authentic German doppelbock. Doppelbock's are higher octane (usually between 7 and 8% ABV) dark German lagers. These beers have been called "liquid bread" and were originally brewed to nourish monks when they were fasting during lent. The original doppelbock was Salvator, which is still around. As homage to the original, most doppelbock names end in "ator".
Hacker-Pschorr Oktoberfest, an authentic Munich marzen, replaced Paulaner Okotberfest, also an authentic Munich marzen. Which do you prefer?