I have owned all three of these balls, in fairness I have made an change to my release and am throwing the ball with more revs, and getting more power on my ball since I had the Roto Grip pieces.  In starting with the 300T I was a bit disappointed as the carry seemed to be a bit lackluster.  I was keeping it slightly dull, but in letting the surface go, and just cleaning it regularly, not dulling it, the 300T has turned into a monster, averaging slightly over 230 in my last 10 games or so in practice with it.  The Pluto I was just never happy with, the layout wasn't great on it, I tried a Rico drilling on it, and it just never performed well, so the layout may have not been the greatest choice.  The Mars was better, I liked that ball on drier lanes, it never really over reacted for me, so I can definitely give a positive review for the Mars, with a no contest on the Pluto as it wasn't drilled similar to the Mars.  The 300T has been great for me with the cleaner, more smooth surface, and has been carrying great.  Good length, and a very contolled move to the pocket, no jump,or flip to the left, the Mars was a bit sharper on the breakpoint. Hope this helps.