They all have interesting back stories, are well written and, you know, are all super hot.
With the choice of seven different characters to pursue they are all completely unique.
In fact, many romance games are Visual Novels, which is a much different game style.
(See for example, the difference between the series, which is very close to a Visual Novel style of gameplay, and the DOA Xtreme series, which is the closest thing to a true Dating Sim with mass-market appeal in the US.) If the game plays out like a Choose Your Own Adventure, that's a Visual Novel.
Since You can buy Dream Daddy: A Dad Dating Simulator from Steam for £10.99You and your daughter, Amanda, have moved to the quiet seaside town of Maple Bay where after attending a friendly neighborhood BBQ everyone you meet is a single hot daddy, what a surprise!