Technically, the Spider Mastermind is *not* stronger than Cybie. Cybie fires rockets. The spider, buffed minigun rounds. The disadvantage Cybie had in Doom and Doom 2 is that his rockets weren't as fast as the spider's bullets, and thus, they could be dodged better. But close and personal, Cybie will give the Spider Mastermind a run for his money. Like in Doom 2 stage "Gotcha!", where you can get them to fight each other if you manage to interpose between them and get away a second before they fire at you.