English ver.
I know G Whim, and I know the differences between these games. However, you probably don't realize how much time separates the creation of these 2 games; HHG is much older than GW, and even half a year in the development of graphic programs, editors, programming methods, etc., can make a gigantic difference in quality. When Komi released the first version of HHG, he set a high standard and directions for similar games at the time, unfortunately, he was stuck for a long time in development. However, the Christmas events proved that Komi works and improves the quality of his game, once again creating high standards in the environment. (Before you started complaining, did you see the winter event?)
It was similar with GW, but the game is younger, so it uses a better version of the animation editor, newer technologies, etc., and has also raised the bar in the environment. It is also a matter of the developer's vision and taste.
All in all, when it comes to animations, there is not much choice for indie developers, they mainly use Koikatsu, which is why all games are similar. Quality takes time and work - quickly made games have basic graphics and simple animations, if you want a professional-looking product, you have to spend time.