Let's take a look at the best prints and compare the results of both Skeinforge to Slic3r and ABS to PLA.

With the tiny pyramid (which measures 5 x 5 x 5 mm), it appears that Skeinforge has done a better job in making a good print in both materials, as shown in the following image:

In the following image, we'll see a comparison of Slic3r and Skeinforge using ABS filament for the bridging test:

In the following image, we'll see a comparison of Slic3r and Skeinforge using PLA filament for the bridging test:

With these results, it appears that Slic3r does work much better for bridging and that equal results can be obtained with ABS and PLA.

Let's look at the following image that shows the results of the wireframe cube we made with TopMod:

Both slicers did an adequate job with printing the cube. Skeinforge has a little sagging with the PLA printed model as shown in the following image:

The following image is the toy block we modified using MeshLab and TopMod:

This isn't a...