The themes are very different. WLFKBJ focuses on career, coming of age, internal struggles and Uchikare's main theme is the mother-daughter relationship. However, the 'slight romance' in Uchikare is very similar to the romance of WLFKBJ, at least the first half. We have the FL in love/likes someone else in the beginning, the ML knows and despite having feelings for her, he helps her through thick and thin. So anyone who enjoys watching men being total supportive simps, you would probably enjoy the slow-burn of Uchikare.
Both are family themed, and a part of the plot, which is a spoiler, is kind of similar. UchiKare is a series with the combination of drama and comedy, but surely has great touching parts. It focuses more of mother and daughter relationship, and just a little bit on the side of the father. Soshite Baton is more of dramatic movie, and has also explored father and daughter relationship with the mother and daughter relationship. Bonus: Okada Kenshi is both on these ;)