Which version of excel are you using? You could try just selecting adjecent empty cells, rightsclick and select 'delete'. Then you choose 'shift cells up'.
For changes, paste the following formula in cell I2:
=IF(AND(EXACT(A:A;J:J);EXACT(B:B;K:K);EXACT(C:C;L:L);EXACT(D:D;M:M);EXACT(E:E;N:N);EXACT(F:F;O:O);EXACT(G:G;P:P);EXACT(H:H;Q:Q));"";"DIFFERENT!")
click cell I2, click the last cell in the I column so all cells in this column exept I1 are selected and press CTRL+D to copy this function to all selected cells. Now if left and right are different the I colum will state 'DIFFERENT!'
