From my experience, I strongly recommend you to choose WES. WES is kinda favored and preferred by some other organizations in Canada. Besides, they conduct a more detailed optional assessmenst, not only for IRCC, but for licensing and job-related. The perk will be your file will be in one location with the same organization, even if you choose not to pursue other services with them.
In addition to that, WES is currently doing expedited services regardless of covid-19 disruptions.
Good luck!