Maybe I missed this within one of the threads, but how does the Guru compare to the original Reax? I have the Reax and thought that was a strong ball. Not sure I will find much use for the Guru if it is even stronger....but then again I saw a very good bowler throwing one in my league last night. Not sure how he did it, but he threw it all 3 games. Just curious as to how these compare. Thanks in advance for your time.