Answer:
The Load Transfer surface and Member Loads from Area Load (Load Wizards) use different approaches to distribute loads to the members. Therefore, they cannot be compared directly.
The Load Transfer surface divides the surface into stripes in a specific direction, then investigates the loads on each stripe separately. The stripe width can be adjusted by activating the Advanced distribution settings option. If necessary, a larger stripe width may be used to “smooth out” the high jumps that are shown graphically (Image 02).
On the other hand, the Load Wizards use isotropic distribution, creates Voronoi cells, and investigates the load at each cell.