The right one has 3 DVDs vs. the left having 2 (same 26 episodes, nothing extra) but it also states "Digitally Re-Mastered on 3 DVDs" whereas the left box has no such statement. Of these two, I'd go with the right box (with waving flag).
Same amount of material, IE hours of video, I'm assuming so sound like the one with only 2 DVD's is compressed more. I've read various reviews of these DVD set's and they seem to be all over the place, some people swear it's great and the next reviewer says it's junk.