My thoughts on it:
Food: Well. First off that food isn't a big deal for organics really. A few food tiles does it for a planet, more if you want faster growth. But also Robots eat electricity at the same rate organics eat food. So resource wise you're pretty close to even there (maybe even food is better, since you get to exploit the food bonus resources) since you basically have to replace farms with power plants. Later on when you've got energy grids and capacity overload power plants probably make more energy then farms make food. But it's close. However, having to build your pops is very expensive in the early game, when minerals are super tight, actually affording 100 bucks per pop is... Very expensive. It'll slow you down in other ways.
Happiness is a big deal and a big negative to robots. Being fully happy is a +20% production bonus. Also without factions you loose out a major source of influence. You're going to end up with way less edicts (IE: Less planet production) and orbitals then a organic race.
Leaders are Immortal: However, organic leaders last for a very very long time. You'll only need to swap out leaders once or twice in a organic game, and a lot of positions gain exp really quick later on in the game, meaning they'll max out their levels quickly. Also robot leaders aren't properly immortal, I believe they die to random events.
Armies: Don't matter.
Machine worlds: Are an okay ascension path. I think it's probably weaker then the synthetic accession path. Which makes you 20% (25% actually because it gives leaders a +5% to almost everything) better at everything. Fully happy Synths are going to get a +40% bonus to production.
Being able to skip some researches is nice. And so is the ability to colonize everywhere right away. It certainly is a really big bonus to robots to be able to do those things, but everything else about robots sorta sucks compared to organics. Robots may or may not (idk) be better, but I don't think it's a crazy big gap.