Well, none of Tamriel's warhammers are rocket powered to my knowledge, so I'm afraid Fallout still has Elder Scrolls beat in that department too.



Now, some guilds in Elder Scrolls are very well-written, such as the Blades, the Dawnguard, and a few others, but I think Fallout's factions are still much better overall. I've started at least 4 characters in Skyrim and I still have yet to officially pick a side in the war between the Empire and the Stormcloaks, it's just never been that interesting.



However, it wasn't long in Fallout 4 and New Vegas before I found myself favoring one side or another, although it helps that each faction in New Vegas is so distinct from each other. Maybe it's because Elder Scrolls factions are sometimes more often defined by region or race than what their actual goals are, but in Fallout, everyone is human. Empire is mostly human, with a little bit of every race thrown in. Stormcloaks are NORDS FUCK YEAH! Aldmeri Dominion are elves, Khajit, and some others, led by the Thalmor, which are elves that hate Talos. Obviously not every faction is racially motivated, such as the Thieves Guild or the Mythic Dawn, but it remains a very important variable.



Each faction in Fallout is visually and ideologically distinct, with clear goals and personalities. And while the setting is so cool it seems like a fantasy world in itself, the fact remains that Fallout is built in the ruins of an older world, and most of the people there are either trying to reclaim some of the old power and glory or build something new. The Minutemen do it by helping people, the Legion does it through conquest and subjugation,

the Brotherhood of Steel do it by hoarding advanced technology, and the Enclave do it through genocide.



TLDR: The Elder Scrolls is another medieval fantasy setting, and while that's still cool, guilds tend to be based soley around race, religion, or region, and good and evil are very clearly defined. Fallout has little race or religion, and factions fight for power within specific regions, and thus focus more on goals and methods, and morality is much more grey.