>>11971718 (OP)
They were both revolutionary. They were both fun to play. The reason Half Life is often seen as more revolutionary is several fold:
Sales, HL was by far the biggest selling PC game for a long time
JK was a Star Wars game and like many licensed games is therefore often forgotten in terms of boundary pushing significance (see also, Terminator: Future Shock - full 3D environment and enemies, and Mouse look a year before Quake)
JK wasn't easily playable on modern machines until quite recently, meaning a lot of people just ignored it.
JK had some online presence, but was marred by dial up connections, and no real modding scene until much later on. HL came in as DSL was becoming commonplace, and Valve heavily encouraged mods and maps, meaning Counterstrike, Team Fortress and many other great mods that later became their own games.
I say all that as someone for whom opening JK on Christmas day and playing Nar Shadaa after Christmas Dinner was a core memory experience.