Building comparison
head to head
Dark Souls IIIvsMortal Shell
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.
Dark Souls III
Execution · Practiced Mastery
The fastest mainline Souls, distilling the formula into aggressive boss duels.
Mortal Shell
Execution · Practiced Mastery
A lean souls-like carried by hardened-parry timing and shell selection.
Dark Souls III leans Execution (Practiced Mastery); Mortal Shell leans Execution (Practiced Mastery).
Dark Souls IIIMortal Shell
Axis by axis
Execution8 vs 8
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Dark Souls III
fast roll timing against aggressive scripted bosses
Mortal Shell
Hardened parry timing demands inputs
Reads1 vs 1
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dark Souls III
PvP invasions exist but are optional
Mortal Shell
Scripted bosses
Variance1 vs 1
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dark Souls III
fixed encounters converge after first sight
Mortal Shell
Minor item randomness
Optimization7 vs 6
Dark Souls III leans a little harder on optimization, though the gap is small.
Dark Souls III
movesets and builds are fully mappable
Mortal Shell
Shell choice and upgrade routing matter
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.