Match prices within a range

Hi, I need a function which enables me to check if two sets of data is identical. Look at my attached example.

funcA should match the price in column C with the price in column H if the number from column A are identical with the number from column F.
It should evaluate the price within a range of +/-1.00 (fx: the function will positively match the prices in row 2, because the difference between 224,067.87 and 224,067.47 are less than +/-1.00).
If the function are able to find a positive match, it should return "OK"
If the function are not able to find a positive match, it should return "DIFF"

Likewise, funcB should match the price in column H with the price in column C if the number from column F are identical with the number from column A.
It should consider the same criteria as funcA.

I sincerely appreciate your time. I know this is a challenging task!

In advance, thank you!

BR
Tobias