"much" and "more" differences..

argument between these two.. 

haha

 

much + non-count noun  (a large amount of something)
much sugar; much milk; much wine; much butter; much sand

many + count noun  (a large number of things)

many boys; many trucks; many rooms; many books
____________________

more + non-count /  more + count  (A larger amount or number of ...)

more sugar; more butter; more boys; more books
____________________

much and many say that the amount or number is great - not small.
more says that the amount of number is greater than another amount or number
                     when you make a comparison.

__________________

You can't have "much chances" because "chance" is a count noun.
In both of your sentences you are comparing one thing to another, so you need "more" in both cases.