The reason why it is so good is mostly the mech portions. Contrary to what you say there being no content when playing the man all the mech portions are as the man and the woman is remotely controlling the drone to direct you. That is what captured so many people's attention, often referred to as comms. It was fun to the point where I would save and load so I could play through every mech level on every corruption level to see all the stuff even though it was somewhat limited in art. Solgante, while having much better art and what little comms there is is high quality, the problem is that word, little. In RaiOhGar every mech level had unique dialogue for each corruption level. In Solgante only one of the routes out of three fill the whole mech portion and a second only had some at the end with the third having none at all. What was the highlight of the game in RaiOhGar became a fucking slog in Solgante because you had to play through the game 3 times, unlike RaiohGar which only split the routes right near the end, and in each playthrough had to grind through those barren mech missions. In addtion Solgante had no corruption progress. The woman didn't get sluttier looking or acting as the game went on whileRaiOhGar had a bunch of unique outfits.
TLDR: RaiOhGar was content rich and fun while Solgante, despite having higher quality content, had so little of it it was a slog to get through the non lewd parts.
