PLB Smaller or Floating which is better

I'm thinking about getting a PLB and am debating between the ACR AquaLink and the ResQLink


The AquaLink floats, has a longer battery file and i think a brighter strobe but is considerably larger and heavier.

The ResQLink is much smaller but does not float. They do have an available flotation pouch but it looks like you need to remove the radio from the pouch to deploy the antenna and activate the beacon. There is always a chance that you could drop the PLB while trying to remove it from the pouch and I'm pretty sure being at the bottom of a lake would prevent the PLB from working.

Is it better to go with a larger unit that may not fit in your PFD and won't necessarily be on your person if you get separated from your kayak. or go with a smaller unit that may sink to the bottom of the lake.