From what I heard from the developers. This newer algo will use a little more electricity and produce less hashrate as before.
It will make ASICs obsolete and will make FGPA more on par with GPUs.
Tested 2x vega56.
- v7 2x2050H/s SrbMiner v1.6.8 - 335W from wall
- v8 2x1950H/s SrbMiner v1.6.8 - 380W from wall
both on same gpu settings.