The Rogue Blade seems really batch dependant. I'm a huge Motiv fan, and have one, and so do a few of my friends, for some of us the Rogue Blade rolls really early and is lazy downlane no matter what surface you put the cover at. Others, and yes a couple of us have drilled two to see if it was us or the ball, have had them be extremely continuous and actually closer to the angular side of things.
That said it's hard to say what you're going to get with them, the good ones are great, and the bad ones, are well, bad.
As far as comparing to a Marvel Pearl, i'd say it is fairly close if you catch one that's angular, but if if you don't, it'll be way earlier and softer downlane, similar in overall strength.
Side note, I did drill up an Idol Pearl and i'd say it's the closest pearl ball i've personally owned to my original Marvel Pearl, I have not thrown a Marvel Pearl remake.