Our 13's started to see a few of the Stealth Speeds, this last Spring, but most were all drop 3's & are now banned for school ball use. One of our late season roster adds had a drop -9 Speed, but he had a bunch of hits with my boys CF4. Know little about the SR league (-9) Voodoo's. Lot of local 13's were swinging the 2009 version of the -3 Voodoo... but that particular bat seems to lose its pop after several months of heavy use.
Instead of swinging -10's in a longer length, the drop 8.5 EXO's & the gold CF4's (marked drop 8 but actually drop 7) seem to have been hottest big barrel bats our 13's used last season. Both the EXO & the CF4 are slightly big end weighted. The one thing my son liked about his 31-24 CF4 is it had a ton of pop & it never seemed to lose that pop. Negative is, like any full composite barrel they scratch & chip up easy esp if any of your park's have a small gravel apron area where bat is tossed. Youngest had the NYSC games on MLB last weekend, & seemed both bats were well used by all lineups.
Mention the durability issue as son's previous year 30-21.5 Exo flat spotted in a few spots, all from game play within 60 games. At 10 & 11, he never had same problem with same model 29" Exo's. Can only credit that to simple physics, pitched ball was coming in faster & swing was every bit as quick, so eventually damage appeared. Not to confuse things, but he's back swinging an EXO now, just a -3.