I would like to compare two experiments in term of their difficulties. I do not like to repeat the words in my sentences. For the comparison, I would like to use much_more to show significant difficulty. I learned that much and more used for uncountable things, for example, sugar.

Here is my sentence:

The second experiments add extra computation which results in much more difficulties in comparison with the one of the first one.

Does use much_more is acceptable in English sentences?