Both are Chinese youth dramas with similar story lines - slightly awkward, not-standardly-pretty high school girl befriends handsome high school boy(s). In the case of A Love So Beautiful, expect a story a little more similar to Playful Kiss/Mischievous Kiss, but not a remake.
Both are youth dramas with similar story lines - awkward not-typically-pretty high school girl befriends handsome high school boy(s). If you enjoy one it's likely you will enjoy the other.
Both dramas focus on martial arts as part of the main storyline, as well as romantic subplots. There are also similar dramatic elements, such a scandal in the past, deceased parents, and a few other similarities. If you like one, you will probably like the other.
There are some definite similarities. Shiritsu Bakaleya Koukou is kind of like Gokusen-lite, with ten times the girls and no teacher making speeches and kicking butts. There's a lot of fighting (but these guys don't seem to get pounded into the ground like the guys from Gokusen do). And a lot of running. And a lot of ragegrowling from a lot of cute guys. There are even similar themes - fighting for what's important, loyalty. Plus, Takaki Yuya from Gokusen 3 is in it. If you enjoyed these things about Gokusen, give it a shot, the episodes are only about 20 minutes.
There are some very similar elements in the stories - shy, seriously introverted girl who is used to being teased/bullied is gradually drawn out of her shell and makes new friends. I think Nobuta Wo Produce is the better story, but if you enjoyed it, you'll probably enjoy Kimi ni Todoke, and vice versa.