I have been looking at both of these balls. but i believe im going to get the 607a se  ----   has anyone thrown both of these? id like to here what is the difference is between the two.  the rg is the same at 2.46 for 16# --- but the cover on the 607a  is reactive. is this a pearl?  the burst states new era, pearl. from the videos ive seen on both balls, the reactions look very impessive, so any info would be great.