I own floor plate, mag Tikka T3 (mag) Blaser R93 (top loader no plate) Sako 595 (Floor plate) Sako 75 III(mag) SA .17HMR (mag)
Mag= IMHO
easiest to load,
Loading a mag separate from the rifle I personally find easier. OK my T3 mag is not as nice as my Sako75 mag, but both are a lot nicer to load than trying to support the rifle whilst top feeding one handed on my Sako595 or Blaser. The Blaser being a particular pain to load top feed. (first time I tried I was struggling so much I thought I had the wrong mag insert. Got used to it now but something you have to get used to, is simply not a good design
Unloading a floor plate is just awful. I can not agree that theres no safety issue with cycling the bolt. If your cycling the bolt theres a risk of accidental discharge even if your safety has a half setting. (my ones don't) I oft unload into the cover of my drag sled to avoid loosing bullets in the dark but often wonder if I am one day going to blow a hole in my car

That said I have 50% of the same issue with my Tikka T3 308. On my Sako I open the bolt slowly to 1/2 extract the round, push the round down into the mag then pop the mag. Brilliant
On my Tikka I cant push the round into the mag from the top so I have to eject one round then pop the mag. Not as good. I also like the way I can pop the mag and check how many rounds I have in it. I only ever load three so I know theres one up the spout if I only have 2 in the mag.
On the up side of floor plates I can 1/2 unload and simply push the round back down into the rifle then keeping the round down, I close the bolt on an empty chamber. Handy for climbing into high seats. As said I can do that on my Sako but not my T3
Mags can fall out. I have had this happen a few times on my Sako sliding the rifle forwards on a shooting rail. On the up side, the mag is easy to find if it does happen but if you accidentally knock a floor plate open, your searching for rounds in long grass again.
The debatable plus for floor plates is you cant forget them. I have forgot my .17HMR mag in the past but it just meant I had to single load it. PITA but not day over.
My Sako Mag is flush with the base of the rifle so I can balance the rifle on the shooting rail. My floor plates are all the same but my Tikka mag sticks out a bit so I cant do that. Sub optimal if trying to get on to the rifle with stealth and I don't like laying my rifle on its side as the windage or parallax knobs are rested on.
The R93 is an odd ball
Its a top loader like a floor plate, but has no floor plate. So to unload with out cycling it, you have to sort of pick out the rounds with your fingers. As I say, odd. Fortunately with the R93 the safety is a proper thing in that it totally de-cocks the rifle when it in safe mode. So for climbing fences or into high seats all I do is put the safety on. This is the quietest way of all my rifles and something I reely like about the 93. Only down side being the safety is a bit slow and clunky to use
In short I prefer mags.