Dell Wireless 370 Bluetooth vs 410 Ultra-Wide Band

Haven't been able to find much information about the differences?

Dell Wireless® 370 Bluetooth Module [add $19]

Dell Wireless® 410 Bluetooth Module with Ultra-Wide Band [add $50]

Considering buying the 410 when I order a new E6400. But is it worth the extra cost? Haven't been able to find many devices which support Ultra-Wide band bluetooth, but I might be nice to have in the future. Secondly, will the 410 drain the battery faster than the 370?

 

http://en.wikipedia.org/wiki/Bluetooth#Bluetooth_high_speed

there you go. Didnt know about either, dont know if there are any devices that use it and I have no idea about the power drainage.

It would be interesting to have some info from ppl, if any, who have actually used it.