Medalist

both are about someone who got a late start in their respective sports, but have the passion and talent to make up for it. both are heartfelt, inspiring, thrilling to watch, and have amazing characters.  

The comedy is identical to Medalist 

Both shows are about a veteran athlete who has been pushed out of their sport discovering a young girl talent in the same sport and choose to mentor her. Further, both shows heavily feature the characters dealing with their personal struggles outside their given sports and what they have to do to live the way they truly want to. 

The two series have the same scriptwriter (Jukki Hanada of Euphonium, YoriMoii and Stein's Gate fame). Both series use a mixture of constantly alternating drama and comedy. Both titles are super popular in Japan but less known in the West. Both use 3D-CGI for animation (Medalist extensively, Girls Band Cry almost exclusively). Both series use motion-capturing as input for the CGI process, Medalist for the skating perfomances, GBC during the rock concert scenes. Both have great OP / ED and OST music.