First of all every set up (bow) is different. Personally I find the Rages work extremely well out of my set up!
I personally like the Rage 3 Blade as IMO it makes more of a “Hole” rather than a “Slit”. A “Slit” to me is easier to plug by tissue, muscle etc. pressing together. I have seen first hand evidence/experience to this last year with a 2 blade. The 3 blade not only helps on entrance and exit wounds but also messing stuff up throughout the wound channel (inside the Deers, Elks, Bears, etc) body). The Rage 2 does have a bigger cutting diameter but the results I have experienced with the 3 blade has me a believer.
But then again you will probably find this a Ford vs. Chevy debate when it comes to Rage 2 vs. Rage 3 blade. 
Just my opinion from a long time Rage User and Believer! 