Head to head
Which one will break you first?
Two fingerprints on one grid. Both are scored through your profile, so this answers the question for you rather than for the average player.
Divinity: Original Sin II is the harder of the two for you, by 0.4 points. The gap is widest on reaction, where Age of Empires II: Definitive Edition asks considerably more than Divinity: Original Sin II. If you want the gentler run, start with Age of Empires II: Definitive Edition.
Axis by axis, biggest gap first
DIVINITY: ORIGINAL SIN II
Armour has to be stripped before any control lands, surfaces do more damage than swords, and the game explains neither. Act two is where under-levelled parties stop entirely.
Sustained pressure. Progress is earned.
AGE OF EMPIRES II: DEFINITIVE EDITION
Build orders are the curve, and the campaigns teach almost none of what the game actually asks for. The hard AI does not forget its economy while it fights.
Sustained pressure. Progress is earned.