if the difference is less than or greater than 50 return value

Hi all

I have an array formula here which looks for a difference between various sets of data and returns values if there is a difference. Could someone help me modify this so rather than having <> to return an absolute difference it will read, if there is a difference between the values of 10 or 50 or 100 return the value

=CONCATENATE(IFERROR(INDIRECT("a"&SMALL(IF($D$2:$D$29<>$J$2:$J$29,ROW($J$2:$J$29),""),ROW(A1))),"")," ",(IFERROR(INDIRECT("B"&SMALL(IF($D$2:$D$29<>$J$2:$J$29,ROW($J$2:$J$29),""),ROW(B1))),"")))

Thanks to anyone to can offer help!

Try this array formula in M7

=IFERROR(INDEX(A$1:A$29&" "&B$1:B$29,SMALL(IF(ABS(D$2:D$29-J$2:J$29)>=50,ROW(D$2:D$29)),ROWS(M$7:M7))),"")

confirm with CTRL+SHIFT+ENTER and copy down the column

That will only return items where the difference is >= 50 - change as required