Graphenes are marketed as higher capacity in same size class due to the graphene being a thinner design. Ergo more mah in the same relative size. The cycle life is also supposed to be a bit longer when charged at 1c rates. Add lihv into the mix and it's a real capacity boost not to mention the extra punch and rpms it will produce. And for stock class guys it means all of this for lighter packs with a longer run time above 4.0 volts per cell. Plus from what I've seen at local tracks, the IR numbers can be a bit lower. Also a good advantage for stock racers as this produces a punchier, faster car for a little longer than regular lipo packs.

This is from personal use and close friends pitting with us at races. My experiences have been very positive including all of the above mentioned aspects, along with less heat in the pack under heavy discharges. Like a lot less heat when pulled to 3.5 volts per cell for stock racing. Less heat also helps increase the usable cycle life, less heat=less damage.

No hype as far as I'm concerned. The new packs when pushed hard in stock racing have an advantage even when charged to a legal 8.40 volts or 4.20 volts per cell. Which also helps increase its usable cycle life as you would only be using 80-90% of the packs actual abilities to provide power.

Hope this helps. Again I'm no engineer, this is just what I've seen and tested along with close friends.