Inferno: Alliance Reborn is a remake for Inferno: Alliance, a FreeSpace 2 SCP mod released back in 2006. Just like its predecessor, INFA Reborn will merge Inferno's typical style with FreeSpace 1's atmosphere.
This screenshot, taken from the FreeSpace Mission Editor (FRED), shows Inferno's alternate version of the GTC Leviathan class of cruisers.
In FreeSpace 2, both the Leviathan and the Fenris share the same mesh and textures. The FreeSpace Upgrade Project has used different textures for the models, which still keep the same mesh.
In Inferno, we make use of a different mesh, and you can see it in the comparative screenshot. Please note that the Leviathan is supposed to be a more heavily armed, armored and, nevertheless, slower version of the GTC Fenris - that's why the Leviathan's design featured in Inferno seems a lot heavier than that of the Fenris.
It's worth noting that this is an old and outdated version of our Leviathan: in the newer version, the rear engines are competely different than those seen in the screenshot (in the current screenshot, they're basically the same of the ones seen on the Fenris).