The Park has the ideal selection of base tools (2.5, 3, 4, 5, 6 and 8mm hex wrenches, T25 & T30 Torx drivers, a combo cross/straight tip screwdriver) as well 8 & 15mm box wrenches, which are essential for removing the rear wheel on single-speed bikes.
A stand alone box wrench gives more leverage for removing the rear wheel, which makes the process easier. However, that doesn't mean the box wrench included in the Park tool is useless- it'll still get the job done, just not as comfortably as a tool dedicated for that purpose
The Topeak Mini 9 includes seven hex bolts, a Torx bolt, and a Phillips screwdriver, and it is suitable for the most common roadside repairs. It's lightweight and compact, while allowing for enough leverage to open even stubborn bolts.