Simplify 3D does currently only provide a Z-Value check (Clearance of the nozzle and fan area on the highth).
It would be very helpfull to have also a X,Y-area collision check.
PRUSA Slicer 2.5.0 do that with only one additional value (called circle X).
The slicer is also able to show a collision warning, if the free area is corrupted.
Even more - clicking on re-arraning button takes into account this free area value - and the models are arrange in a way,
so that no collision is anymore existing.