How do I display two different structured ALV Grids on one screen?
For this you can use BLOCK List, for Block list refer the program BALVBT01
You can also do that using Class CL_GUI_ALV_GRID.
For class refer the sample BCALV_TEST_GRID_DRAG_DROP
here you can see the Grid side by side. if you want, you can place them up and down also.
Hope this will help.