On this page you can compare only free PDF printers. To compare free and paid ones and to read more about what to look for, go to this page.
PDF24 Creator comes with extended features and a very good speed of conversion. The file size is not the smallest, but this program compensates at features and options. You can customize the quality and reduce the size of the file, add watermark, password and restrict the printing or modifications.
FreePDF is made by a German developer, it doesn't have a modern look & feel, but is good at speed and file size. As features, you can set password and restrict editing rights.
PDFCreator is free and open source, but lately they released some Pro versions. The free version will convert to PDF at a reliable speed and with a small file size. The program has many advanced features.