1. Linux kernel 3.10 is newer than the classical gaia - in the future we plan to move kernels more often so kernel versions are expected to be part of new versions
2. Kernel 3.10 first introduced in R80.20 as side branch. In R80.30 its integrated meaning it also has full jumbo etc... in R80.40 we are likely to have only this kernel.
In the future new versions may bring new kernels more regularly.
3. R80.10 didnt have this kernel version as option and therefore requires special handling
4. By now we have more mgmt servers on R80.20 than R80.10 and R77.30 and R80.20 is already out in the market for a year. Therefore we strongly recommend to use R80.20 or .30 and not to go to R80.10 today.