Fusion is a modern styled server with a good tileset, itemsystem, banks, trains and cars and it will have customized player outfits system, unique weapons, factories and much more in near future!
Please don't expect to much at the moment because Fusion is currently under development but it is progressed more like many other development servers. At the moment, you are able to drive cars, go by train, use ATM's and the inventory (also you can drop items and change the order of items in the inventory) and use some provisory weapons.
You can't really compare Fusion with other modern servers because it has its own style (e.g. tileset patched-up out of free GFX) and concepts of handling different things like items (you can drop items and will stay as owner of the item until you double click it), cars etc.