In this 3G Newsroom article it says. "Future LG handsets would be installed with Microsoft's Windows Mobile software in the most expensive phones and Symbian software in mid-priced models, Yi said. LG is looking to introduce their first model late next year based on Symbian software." I'm not sure why Microsoft will be more expensive but there you go.
LG Electronics Symbian smartphone?
MS phones are probably more expensive since the bloat of the OS means that they need to have much more hardware to perform the same functions. One of the consequences of this is the poor battery life that MS phones offer
probaly they mean high-end device for corporate market. after seeing Sierra Wireless' device, the voq is by bar the only real corporate phone, no symbian can match voq's support for corporate services, like MS Exchange, Lotus Note, Novell Groupware
middle price for consumers, symbian, especially Series60, is a better choice for consumer OS