No different style. Merriweather is probably more athletic. Rodney relies more on being Physical, and using his brain. He can diagnose plays pretty quickly, and fly’s right towards the action.
Mike Griffin’s style is a lot more like Harrison’s.
This is partly why I find your opinion's of Meriweather somewhat laughable. What you just said about Rodney is exactly what Meriweather's strength's are.
From Scouts Inc.
"Is a versatile safety prospect with good range versus the run and pass. He lacks ideal size but fills hard versus the run. Shows better power at the point of attack as a tackler than his size would indicate. He plays with a great motor and a mean streak. He makes his presence known over the middle of the field and will throw his body around. Very reliable tackler in the open field. He shows good instincts and initial quickness. Diagnoses plays quickly and consistently takes solid angles. He has better than average range in deep zone coverage. His ball skills are adequate. Shows very good football intelligence and is a leader in the secondary. Great experience at the highest level of collegiate competition."
http://insider.espn.go.com/nfldraft/draft/tracker/player?id=10946
here's Sports Xchange:
"Despite his compact frame, he hits like a linebacker and will not hesitate to lay it all out to make the play … Very well-prepared to face his opponent, putting in the extra hours in the film room studying tapes … Vocal team leader who is respected by his teammates"
"Has great route recognition skills and an instinctive feel for movement in the pocket"
"Stays fluid and calm in man coverage and won't bite on fakes and counter moves by the receiver"
"The thing you see on film is his ability to mirror without allowing separation"
"Quick to make proper reads and is rarely caught out of position at the top end of the zone"
"Sifts out the ball through trash when playing against the run, taking proper angles to shorten his path to the ball"
" Sure tackler in space who strikes with force on every opportunity to put his hat into the opponent's chest."
"Compares To: Ed Reed, Baltimore Ravens … Whenever the Ravens need a big play, it is Reed who is likely to come through with it, not Ray Lewis … Meriweather is in the same mold as Reed, as he uses his excellent route recognition skills and range to consistently shut down his pass coverage assignments"