I'm only answering because I'm Dean and that's a crazy amount of cheese.
Anyway we're to compare 10:6 with 5:3
or the fractions
[tex]\dfrac{10}{6} \quad \quad \textrm{and} \quad \quad \dfrac{5}{3}[/tex]
Those fractions are of course equal as we can divide 10 and 6 each by two to get 5 and 3.
Dean's & Louis's recipes have the same cheddar to jack ratio.