One BIG advantage to a tracker/communicator is it will (may) help if you are incapacitated. The plb requires activation. I know there are plenty of situations where it might not work, but there is no situation where a plb will work without activation.

This feature may not matter to you if the reason you cant activate it is because you are dead, but it will matter to your friends and family to aid in a fast resolution of a rescue/recovery attempt.

I have both, "belt and braces" as the British say, but that is just because I bought the plb before inreach was available. I have also used the inreach for boating in the back county of the Everglades, trips in Newfoundland and other off grid locations. No issues.

If I had to choose, hands down, inreach.

Rick