Itext is certainly more feature complete, but Prawn is pretty capable. It probably is more pleasant syntax-wise than iText, so for simple needs, Prawn might be

Itext is certainly more feature complete, but Prawn is pretty capable. It probably is more pleasant syntax-wise than iText, so for simple needs, Prawn might be better. iText is almost certainly significantly faster, but I haven't benchmarked. If there are very cool low level features in iText that you'd like to see in Prawn, let us know on our mailing list.