The ping latency is only a roughly measured distance latency from our Equinix LD4 and Equinix NY4 facility. It is not really an adequate tool to be well informed about the execution latency. During trading you use mainly TCP protocol and not ICMP which is used by ping messages.
All of our VPSs are connected to the same ultralow latency network we have with a 10 Gb/s low latency network card except the Economic VPSs that which have a 1 Gb/s card.
Please be aware that trading latency is determined by many factors and some most important one like execution latency is not under our control. However, you will have a faster setup with Standard VPS than with Economic and you will be faster with Premium than with Standard and so on.