Artificial stupidity

[JPSeraph]

How does the AI scale in this game? Is Easy simply resource deprived or is it also less intelligent than Normal, for instance.

And I gather that the two Hard difficulties mostly benefit from improved resources rather than improved strategy in comparison to Normal or is this incorrect?

I like to play SP versus an AI that is intelligent but not one loaded with resources as my playing style is somewhat ponderous.

So far I've found that Normal difficulty is maybe a little faster than I'd like, but if the AI on Easy isn't going to avail itself of the same strategies as Normal, then I'd rather stick with Normal.