Well, I could never figure out why Rogue couldn’t control her power. Obviously, they had to do that to make the story believable, but I never got how it fit into cannon. So MY Rogue would be able to assimilate and retain all and any abilites at will (WITHOUT the pesky memories), so she’d ALSO be a telepath who could combat Jean. And everything else, of course.
But apart from abilities, you have to admit that Rogue is sooo much cooler. Jean is just so perfect and bland.