From the preview: "Like to admit it or not, Nintendo has cornered the market on mascot-based video games. Other companies have tried their hand at them but nobody has achieved the same level of success as Nintendo with series like Mario Kart, Mario Golf, and the Super Smash. Bros. (SSB). The fighting genre in particular (Smash Bros.) is a particularly hard breed of game to create using a variety of mascots. How do you put together characters from vastly different worlds and have people take their confrontation(s) seriously? Does Mario really stand a chance when facing off against Samus Aran? The truth is, he doesn’t. If you can find a way to put them on a level playing field, by perhaps putting them on a level that focuses more on the strength of their character rather than their physical brawn, then things seem to work out."
We know, they are similar. That's how genres work.
If that's all you can think of to write about, you should stop trying to be a games journalist.