either your extents are different or they use a different method of referencing the grid. esri uses the center of the cell to denote position when creating rasters, other software may use a different location. In any event, they seem to be shifted by 1/2 cell size in the x and maybe 1 in the y direction. You will need to confirm the extents and cell sizes. Also, in arcmap, it is wise to use a snap raster to ensure that cell edges etc align properly