@Dgamby 

The RE305 will have a bit better signal reception over the RE220 thanks to the external antennas, but other than that and a chasiss that have very similar features.  If you are dealing with a Wi-Fi absorbing enviroment, you might want to look into our WPA wireless powerline products as a viable option.  These would allow you to transmit your signal via the powerlines bypassing this type of interference.

With powerline there are a few caviets to understand though.

1.  both units the base at the router and the remote unit have to be connected to the same panel.  It can be different cricuts in the panel though.

2.  Each circuit hop from breaker to breaker will reduce the connection rate.  Much like every item a wireless signal goes through slows it down, but not to the same degree.

3.  Distance, a total distance of 300 meters between the adapters.

4.  age of the power line.  If the lines are old and insuffientely insulated you may see a bit of bleed off which will lower the connection rate. 

5.  Appliances.  Everything on the powerlines creates interference or noise.  Plug major appliaces and eletronics into surge protectors when ever possible to reduce this interference.  

Best Regards