I personally think street fight is better. Although showdown has a pretty good tune to it, the main melody gets repeated for a REALLY long time near the end of the song, which can end up sounding a bit repetitive. While i'd say they both have equal musical quality in terms of chord progression and such, Street Fight is less repetitive and flows better.
actually listening to both of them again i think street fight sounds way better- the piano despite being just 1 note varying after that 1 note plays over and over sounds like 10x better than the part in showdown, and showdown really only has 1 part that sounds really good, so i think street fight is better now
Honestly I like street fight more because of a few reasons. First of all, it is overall less messy and more well-made. Some parts in showdown sound sloppy and odd. Street fight gets straight to the point and does not have any major flaws. I also just think the melodies in street fight are better than showdown. Overall, I just think street fight is less messy than showdown. (Sorry for the long comment lol)