Both are yaoi manga which have a 'slice of life' feel and family themes. While both manga feature yaoi relationships, they also feature familial relationships (such as the father-daughter relationship in Only Serious About You and the interactions between the brothers in Home Drama). If you like one, you will probably like the other.
Both are BL manga that have a 'slice of life' feel and family themes. Both are only one volume long; thus, are good choices if you are looking for something short to read. While they have different plots, they both are targeted towards the same audience. If you like one, you will probably enjoy the other.