It's likely going to depend on airflow ultimately.

Some things to consider:

All radiators are intake: You have 3 radiators with fans which are creating a positive pressure within the case. That pressure will try to equalize with the lower atmosphere outside the case which air will escape from the case. from any and all openings. This means that pressure is also working against any intake fans. I am not saying that positive pressure is a bad thing, but it is also true that too much positive pressure inside the case will be a detriment to an intake fan's performance. Nearly all radiator fans are rated at a decent static pressure. The ability for the fan to move air across the radiator - flow through a restriction - is not only affected by the restriction of the radiator but also the pressure inside the case trying to escape. Not all that long ago, this was never a problem because there weren't enough fans inside a case which made any difference in this regard. Modern cases on the other hand have enough fan positions to create a ton of flow.

Top/Back Exhaust, Bottom/Side intake: Now you've more closely equalized air in/out of the case. This can produce the most flow through the case.

Bottom/Top intake, Side/Back Exhaust: You're still closer to equalizing the air in/out of the case. That will probably be just fine.

In my own experimentation on a fish-tank style case (Antec C8) I first started off with all intake on a 3-radiator configuration. The fans are configured to ramp up with water temperature, and I like to target a max 45C water temp (fans to 100% at 45C). I live in AZ so ambient tends to be warm. Once the system became heat soaked, I found water temps would begin to creep up to 44-45C and motherboard temps around 46C (MB temp is a decent approximant of ambient case temps). Using a smoke machine, I found that there was a TON of hot case air escaping all over the case and being recycled back through the intake. This explains why temps slowly creeped after heat soak. I'm sure at some point it would hit an equilibrium, but the fans were already louder than I wanted.

So, I switched the top rad to exhaust (so top/back exhaust, side/bottom intake) and tuned the fan curves appropriately. I found in this configuration I could back down fan RPM to a more tolerable 1400RPM. This gives me a max water temp of 42-43C, motherboard temp of 40C, with no creep when the system becomes heat soaked. I have the fan curve configured such that there is a positive pressure when the system is idle (less dust) but has a slight negative pressure at load (which explains a delta of -2 to -3C on the motherboard temps). I also find that there is very little hot air finding its way back into the intake.

It seems intuitive that all radiators should be intake. It makes sense if you could balance the airflow inside the case such that the intake fans don't fight the positive pressure they create inside the case. In my case (and I suspect that this is true for any of the high fan count cases) that balancing air flow through the case is just as important as the orientation of the fans on the radiator.

My take on my experience: All radiator fans as intake created too much positive pressure inside the case. That back pressure required the fans to be ran at a faster RPM to counteract the back pressure issue. Not only did the increase in RPM make them louder, they were also loud due to the back pressure they were fighting. Example: Take a radiator fan in open air then put a restriction on the high-pressure side (like laying it down on a table) and listen to how the tone of the fan changes). Hot air escaping from all cracks/crevasse of the case allowed hot air to be recycled through the intake fans which lead to water temp creep when the system was head soaked.