Similar theme about mostly platonic relationship, although in Boku Suki it's handled in much more light-hearted way instead of going to abyss like in Gekijou. The male leads are clumsy characters too, although again the one in Gekijou is a lot more pronounced. Both are also written by the same writer (Matayoshi Naoki).

Both stem from not ground-breaking (often bordering very cliche) concepts, yet they manage to pull unexpectedly great executions

Both are of similar niche and theme - very indie-budget youth-themed movies that involve characters who are members of theater club.

Both are narrated from the third-person observers and the 'main' actions (Kirishima's struggle in Kirishima Bukatsu and baseball game in Alps Stand) aren't shown to the audience.

Similar directing style and message, although the main characters in Alive are more 3-dimensional. Both also contain great educational materials, which make them more relevant than many medical-themed doramas out there.

Both were written by the same writers (Kizara Izumi, which is a group of two). I'd say Yuube no Curry is a definite spiritual sequel of Suika and incorporates a lot of elements that had been used in the latter (i.e. Obon festival).