By the preferences of Dude Quest.
A pretty sweet list of top ten SHMUPs of all time is actually are favorites by this guy. But the list is great for sure and it has the game by Compile mentioned. If you did not know Compile developed The Guardian Legend. That’s why there are some similarities in the Space Megaforce.
Don’t blame author too much for not including some powerfull titles that could beat some mentioned games 🙂