The Typhon class gunboat is one of the most valuable gunboats available. It has enough power to hold more weapons than other gunboats. In groups of 3 or 4 these gunboats can even take out battleships if needed.
The Saphiras is a new gunboat developed by the LSF. The first few versions of this ship have been delivered to the Order to test them in real battles. It looks like the Saphiras might become one of the standard gunboats in Sirius.
The Spectra has its name from its new hull which is a result of a new hull type. New materials were used to build this ship reducing the mass of this ship. Maybe this will be used more often for future ship designs.