The manual you received with your Focus ST is the same manual that everyone else received. So yes, the engine fuse box is the same. There may be empty spaces in fuse blocks that are unapplicable for your car, like seat heaters in and ST 1 or base model focus.
The major differences between the ST and the other focus are illustrated in the ST supplemental manual supplied with your car. Here's where ST specific things are discussed, like the three gauge cluster, stability control options and tire differences are described.
The year of the car definitely matters. For example the Active air shutter fuse for the 2012-2014 is in the same fuse box but is a different fuse number than the 2015/2016. It's best to google the year of your car followed by focus manual, and you will find the manual appropriate to your car.
