Quilty
As part of a current DF fortress mode vs Gnomoria comparison, I would say Gnomoria lacks and/or needs:
- morale, gnomes going berserk. They can take any and all death with ease which is a bit robotic compared to DF dwarves. Indeed while they have stats they lack individuality apart from different looks, also it could use stuff like gnomes marrying and having kids.
- epic monsters, because the regular enemies do get piss easy if you survive long enough (at least the surviving long enough bit is challenging)
- more enemies in general, has like 6 types at the moment not counting wild animals.
- more wild animals and being able to tame them (I want a pet bear for guard duty damn it!).
- different biomes/environments. Only generic temperate (albeit with wild orange trees) forests/hills for now. Could use volcanoes and ice, deserts and swamps.
- cemeteries and burying gnomes.
- more mechanical devices like water pumps, water wheels, flood gates and the like not to mention minecarts would be much appreciated. Water works properly but rivers don't appear to be coded in yet. Magma-powered things would also be nice.
- more minerals, there's a bunch of them but not the sperging amount toady has in DF. Also ore is pure (unlike say galena or tetrahedrite of DF) which may or may not be an issue for you.
- more plants, mushrooms are being worked on now though. Also you can grow cotton and wheat underground with no explanation.
- gravity, that is no more floating floors or blocks with nothing suspending it in the air.
- more reasons to trade with the outside world.
- better cavern generation, they're pretty dull for now.
- no visual differences between seasons, trees just don't grow fruit and grass doesn't spread to empty dirt floor tiles in winter. Water doesn't freeze.
- no forest fires
Of course it also lacks the whole world generation and simulation thing DF has, it only generates the map and a few random off-screen enemy kingdoms around it.
The things Gnomoria does better than DF however are:
- an actual mouse-compatible GUI, a really good one IMO with sensible keyboard shortcuts under 1-0 number keys.
- being able to select the building materials for furniture before placing the furniture, thus allowing easy placement of identical stuff.
- automatically adding basic ingredients to the queue list at an appropriate workshop when you make new orders. Say you order to make a bed at the carpenter's, the carpenter's workshop will also get orders for bed frame and sticks, the sawmill for planks for the bed frame, the tailor for the mattress and the loom for the bolts of cloth for the mattress. Greatly reduces tedious micro.
- likewise crafting ingredient chains are more complex like the bed mentioned above (you can make shitty beds just from straw at the start though).
- being able to plant trees or make orchards for apple/orange harvesting.
- having to build and fill troughs for ranched animals with straw.
- easy expanding of designates areas like stockpiles or pastures without having to delete and recreate them.
- squad perk and tactics system. You can have gnomes focus in disarming opponents, knocking them down, finishing knocked down opponents etc. giving them bonuses.
- inventing random mechanisms, a nice touch which also makes the early survival harder since you can't build traps from the start.
- making sausages from dead goblin attackers, you can also make floors out of their bones or helmets and bone-shirts. No skull thrones though.
- pretty decorative blocks and of course better graphics overall.
Difficulty wise they're pretty equal at least in the beginning, although attacks come faster than in DF and you don't have traps early on (or the manpower to waste time tinkering). So casualties are to be expected unless you prepare well. In fact you could argue attacks come too often, especially if your food stockpiles attract mants (man-ants). But attack strength and frequency can be adjusted as can the rate of their strength's growth.
It's a fair alternative, mostly because the UI is much better than in DF, but of course apart from the awful as fuck UI DF has a lot more going for it. Still for now it looks like this is the best DF clone, not saying much but I wouldn't dismiss Gnomoria because overall it is heading into a good direction for now. It does however need more features as mentioned above.