Hi Lahm,
There are lots of different between CL_SALV_TABLE and REUSE_ALV_GRID_DISPLAY.
1 is from T-Code se24 and 1 is from T-Code se37.
The edit way of Field catalog , User Command forms are not the same.
If you want to konw "Why we must use CL_SALV_TABLE for ALV"?
I guess you'd better ask your project manager or some one who ask you to do this.
Because I think may be is for the coding standard(Every Coder can change the code quickly ).
Any way. White cat, black cat are good cat who catch the mouse.
Regards.