AC minisplit (two condenser ((2x 24k) vs one condenser_48K with two branch boxes)
If you locate two mini-split condensers so close together that the hot air from one unit can drift into the other unit when the wind blows from a certain direction, that will reduce the efficiency. It would be better to separate the two condensers so hot air from one can dissipate before it reaches the other unit.
Also, try to locate condensers on the side of the house that is shady and cooler in the afternoon.