Can 'o Worms that one. Either design will work well if both the design and manufacturing are excellent, whilst either type can fail miserably if not. I find it difficult to give a general answer to the question that applies to a wide range of guns, so if you could be more specific as to which model(s) you're thinking about then the answer could be made more specific.
HW100KT, ATN X-Sght 4K Pro, MTC Taipan 6-24x56; HW97K, MTC Viper 10x44
Walther LGV Comp Pro, MTC Connect 3-12
HW45, Beretta 92fs, Premier, Tempest, MkIII, Orig. Mod50