Since both are an EDR solution, I would suggest analyzing which provides end to end mitigation. I know CB has 3 modules for the detailed analysis but not sure on the CrowdStrike.

It should be neither of these two if you are looking for a log management. Arcsight is one good product I have come across for log management.

Yes as mentioned above,DD about the environment is mandatory only based on that we can propose a solution. However just FYI, Symantec is Leader in Magic Quadrant for 2018 & for past few years. You can get the Gartner report for Endpoint Security.

With the latest feature of Machine learning & additional enhancements in SEP14, its almost next generation endpoint application in place.

It should work. I have tested with TrendMicro Deep security not with Symantec\Kaspersky. Cylance doesn't work like traditional Antivirus Software.

IPS & Blocking unwanted extensions at gateway level.