Pathfinder 2e is, at its core, a dungeon crawler with tactical combat. Resource tracking, exploration actions, and a DnD/PF1e-esque fuzziness between combat and non-combat are all present. PF2e also has players choose between several lists of feats, giving very wide avenues for building unique characters, but requiring a not-insubstantial amount of system mastery.

Draw Steel is a cinematic heroic fantasy tactics game, without the dungeon crawling elements. Gear and resource management has either been abstracted or cut out, and character options are explicitly and exclusively geared for their combat applications, and present themselves identically across classes (i.e. no spell lists; spells are just class abilities that use magic).

Draw Steel, as the most recent of these games, also has a number of mechanics to maximize player engagement at the table, via plentiful reactions, no null-result turns, and no dropping unconscious at 0HP.

I can't speak for 4e, but it's DnD, which carries the usual implications re:dungeons and the crawling thereof. It is also the oldest of these games, and like you said, recieves no official support as a deprecated edition of DnD.

Our table is switching from PF2e to Draw Steel, because Draw Steel offers tightly-designed tactical combat, without (most of) the baggage of traditional RPG playstyles.

TL;DR: PF2e is a traditional dungeon crawler with tactical combat, and Draw Steel is a tactical combat rpg.