So i have been doing some more WiFi testing
2x IoT Labs WiFi modules running happily side by side
MountaineerUSB running 4.3.1
WiFi module with internal antenna
Octopus running 4.2
WiFi module with external antenna via UFL connector.
Both projects are calling a RESTful service to a server in a Data Centre and passing in a random INT and inserting into a SQL DB.
With a single board running it is averaging around 7.2 calls per second. With 2 projects running it is ~10.5 call per second.
Here is the current running total http://netmf.ingenuitymicro.com/default.aspx