Surveyor also makes concurrent traceroutes which provides route history information. Surveyor is more accurate and better for short term measurement, especially for sites which have good connectivity. Surveyor currently provides daily snapshots of performance. PingER uses an existing host with no special software installed at the monitored site and does not require a GPS system. PingER is a more light weight solution, requires less management, uses less bandwidth, requires less storage, and nothing needs to be installed at the remotely monitored sites.
PingER is good for remote sites with poor connectivity.
PingER, today, has more reports available for showing long term trends. Linear random about 1st 15 seconds of min. There is both a high and a low RTT tail. The Surveyor distributions also show sharp peaks with a high RTT tail. SLAC to CERN and 105 msec.