I have played the game and I'm not a big fan of the battle mechanics myself but the way you described the game is no different than how you would describe just about every single other game on the site.
FKG is basically just run event missions every day til your stamina runs out and upgrade girls. Likewise with SenPro and every other game. They all become nothing but tedious repetitive grinding stamina-based games, no different than this game. In terms of comparing different features, this game at least has far more to offer than FKG.
And bringing up knock offs is pointless since so many of these games are just knock offs of other games turned r18. I forgot the name of SenPro's copied game since it was so obscure but I'll post it if I can find it.