Soldato
It's not really advice, just a thought for you to consider. Fins per inch and other factors might determine there is very little between either of them in terms of absolute cooling. Perhaps the same might apply to noise.
It might just some down to choice and which offers you the most flexibility in the cases you choose. Personally, this is just my preference, I would go for a 360 over that of a 280, but if you have one already maybe it will cost you to return / restock that..?
If you are now thinking about a new case then you can focus on which case will allow you to fit the AIO you have chosen to go with in the top, and it must have a decent height allowance, as you have noted, to cope with the thicker rads / fans of an Arctic Freezer II, of either size and allow the EPS cable(s) to fit.
It might just some down to choice and which offers you the most flexibility in the cases you choose. Personally, this is just my preference, I would go for a 360 over that of a 280, but if you have one already maybe it will cost you to return / restock that..?
If you are now thinking about a new case then you can focus on which case will allow you to fit the AIO you have chosen to go with in the top, and it must have a decent height allowance, as you have noted, to cope with the thicker rads / fans of an Arctic Freezer II, of either size and allow the EPS cable(s) to fit.