I see parallels between Puckler and Frederick the Great in terms of their extra-ness, if you will. Clearly Frederick the Great went to great lengths to impress others (especially the French) and assert his authority via his designs. Similarly, Puckler's framed views of his Schloss were intended to astound the viewer. Puckler's weirs, waterfalls and various other eccentric follies strike me as playful, as do Sansoucci's monumental mindmill, orangeries, and marble grand room.  

However, the two men's status within the monarchy was highly influential on the designs created. Frederick was the leader of Prussia, as opposed to Puckler who was simply a Prince by-way-of-smarminess. Overall, Puckler's designs have much less national symbolism compared to Sansoucci, and Puckler's estate does not include hardly any statuary. On the other hand, Puckler's novel planting strategies of tree clumps, as well as his experimentation with natural-seeming waterways, are not found at Sansoucci. I wonder if, although Frederich the Great was still an unconventional King (having eschewed the consummation of his marriage and refusing to provide an heir) he still felt bound to design and construct a palace in somewhat more traditional fashion (strong axes, approach of allees, references to classical mythology) Obviously, time has a stake in this (Puckler was born one year before Frederich died), but I think that their status played a large role as well in shaping the extra-ness of their design inclinations.