Both dramas portray an actor in his everyday life, and both have some quirky comedy moments here and there.
(note: this goes also for the other two "...no Satsukyu" seasons, of course)

Both have a middle-aged male lead, and both have elements of "iyashikei" and food drama, plus a little bit of comedy.

Both dramas portray slow-burned and more maturely deep romances (instead of the shallow fluff overdoses so common nowadays), and both have sports as a subgenre (bowling here, boxing there)

Both portray a funny, quirky and warm family, with frequent chats/discussions that start from minimalistic, everyday details, to end up touching big philosophical questions and giving precious life lessons.

Both portray a funny, quirky and warm family, with frequent chats/discussions that start from minimalistic, everyday details, to end up touching big philosophical questions and giving precious life lessons.

Both "Ore no Hanashi wa Nagai" and "Saigo Kara Nibanme no Koi" (of which there's also a sequel, by the way!) are dramas that shine for the überfunny, philosophical and theatrical family discussions over meals...^__^

Both dramas feature a FL who wants to become a voice actress, sharing an apartment with other girls who have the same dream.

Both dramas have a cast consisting, mostly, of Hinatazaka46 members, and convey nice, uplifting messages.

Both are set in the 90s and feature a group of schoolmates and friends in their coming-of-age moment. Oh, and both are absolutely top-notch! ^__-

Both dramas' MLs travel back to the past and more precisely to their high school years, and both dramas actually use this trope to portray a huge, inspirational, life-changing personal development.

Both Hitsudan Hostess and I Just Wanna Hug You (aka Dakishimetai - Shinjitsu no Monogatari) are centered around a female main character with a disability, in both cases played by Kitagawa Keiko

Both Hitsudan Hostess and Kimi no Te ga Sasayaite Iru are centered around a deaf female as the main character