Fishing vest worn over pfd?

[StocktonDon]

My Extrasport Retroglide has the best strap / fit /adjustment system I could find, and it has two great pockets plus a couple attachment points. But my survival / emergency gear will take up all that.

The angler - type vests do not have the fit / strap system.

I want to be able to take off the fishing vest for storage and travel, both in and out of the kayak. I also want to be able to use it to fish from shore or wading.

The mesh-type vests with built-in and add-on "zingers" or mini-gear-leashes really appeal to me.

Some have cautioned against compromising the worth of the pfd, but what is the difference between a loaded angler-type pfd and a pfd plus removable angling vest?