He's the only MGS character that has true super human speed. He uses an ability called Zero Shift that lets him zip around, the only problem is that it wears him out quickly. He's the fastest MGS character but can't keep it up for long
He has a type of mind control but people can resist it.
Solidus is probably stronger, a better fighter
Gene is faster, is more varied
Both got their asses kicked by humans but it looks worse for Gene IMO since Solidus lost to Raiden, who can at least deflect bullets. Gene lost to Big Boss on the other hand who doesn't have any peak human stats.
And it's not Raiden that can deflect bullets at the time of that fight, he doesn't get that fast until he turns into a Cyber Ninja. It's the sword he was using.
Against those 3 soldiers right before you get to Solidus, it tells you to hold the button to block the bullets.
And Raiden was at the level of a standard gene soldier. The same ones that Solid Snake walked through like tall grass. None of them were good enough to deflect bullets. Only Vamp and Cyber Ninjas.