They are of different genres so you can't really compare them. Sonny is adventure and LS2 is action (or shooting). Unless you are referring which is best on a general scale and not comparing specifics then I favour Sonny, too. Action/shooting games are way overrated in most cases and I really don't find shooting games THAT fun at all.
they are both great games but once you beat LS 1/2 its not fun to go back and redo sonny ive completed several times and still play it on the odd occasion. farrow i see where ur comin from but not the same opinion about the 2 games. rpgs always take several hours to several days games like LS 1/2 you can do in a lot shorter amount of time.