According to Passmark, the 4810MQ has a single-thread score of 2055, versus 1768 for the 2699 v4. Thus I would expect the mobile system to take about 14% less time to run an analysis, assuming everything else is equal.
As Guilio says, only a small portion of the analysis uses multiple cores; I would say that if the CPU time at the end of the run is twice the elapsed time, the system is running fairly well without any bottlenecks. I've just run a medium-sized analysis in 1290 seconds with 2370 seconds of CPU time; my colleague's machine previously took 5000/6400, suggesting maybe some disk limitations (he has less RAM, needing more temp file access; and I put the results on a RAM disk)
Note that disk writing time can have a significant effect for large analyses, hence the recommendation for an SSD - this is mitigated by lots of RAM because it reduces the amount of disk read/write for temporary files, but this never reduces to zero.
Have you increased the SOLRAM ("memory allocation for solver") setting? This is important to achieve the reduction in temp file access - if you have lots of RAM then set it to the maximum of 16384 MB (IIRC), provided this is no more than half your installed RAM size. The default of 128 MB is rather outdated now!
What you really want is an overclocked i7-7700k! (although it seems they may not overclock too well...)
