I’m surprised you disliked Syndicate story yet adored Unity’s. Sure Syndicate’s story isn’t anything to write home about but I found it at least consistent and coherent. It’s a typical, evil mastermind needs to be taken down story. Is it amazing? Not really but it’s serviceable. Unity on the other hand, is… To be honest, I can’t even remember any parts of it other than Arno being a miserable prick for most of it.
Unity definitely had the much better gameplay though. Parkour, co-op, assassination missions and the beautiful rendition of Paris were all great.
That’s not the point they’re trying to make I think. It’s more of an attack on perfection. Like “the alternative is not perfect either so why not just stay with Chrome”. It’s not a very strong argument in general but it might be enough to keep people from switching.