Closer to the equator makes it easier to achieve an equatorial orbit and some slight benefits from the initial speed of the Earth's rotation but Super Heavy is

Closer to the equator makes it easier to achieve an equatorial orbit and some slight benefits from the initial speed of the Earth's rotation but Super Heavy is so ridiculously over sized it doesn't need it. Things like the ISS are highly inclined so they're easier to reach from Russia's launch site as your latitude is essentially the default inclination you're be in when you hit orbit without spending the fuel to change it.