Incorrect. Scorching Ray has a higher potential damage output than a Rogue (and always will, do the math) and has a greater chance to deal at least SOME damage each turn. The rogue has higher defence than a spellcaster and higher single-target damage output than a fighter, but they also have lower defence than a fighter and lower damage output than a spellcaster. And if they miss, they get nothing.
The disengage and dex save stuff doesn’t apply to either end of the equation. And casting components so rarely come up that it’s clear you’re just fishing.
But again, it doesn’t matter how much damage a rogue can deal OR how tanky they are. If they defeat both the fighter and the caster but take a lot of damage in the process, they’re dead to the guy who sat out the fight until they could win. You never mentioned how a rogue is better than a guy with tactical planning skills.
Honestly, instead of talking about a rogue’s damage capabilities, you should talk about how they can hide as a bonus action and can have expertise in Stealth. They can BE the guy with tactical planning skills, damage be damned.