The fundamental equations for QED (electromagnetic force) and QCD (strong force) are similar, but the solutions are radically different as gluons interact with themselves in a peculiar way. And we only know how to solve QCD equations at short distances where the force is small. Solving QCD at large distances is one of the unsolved "Millenium problems" [1].
[1] https://www.claymath.org/millennium-problems/yang%E2%80%93mi...