In this study, we compared some fundamental characteristics of online Delphi (OL) and real-time Delphi (RT). We established a set of variables through a literature review; a platform was built to gather data with the involvement of dozens of testers. The findings of this study are: 1) the time of use for RT is significant but the time pressure in RT survey made testers overwhelmed to manage progress of the exercise; therefore, some automatic functions are identified and suggested; 2) the RT cannot only reduce time and costs needed for OL, but also can obviously increase the level of consensus in general; 3) the RT assisted in increasing convergence and consensus among testers. Furthermore, we proposed that the RT could have some potential applications which are leading to further studies.