Hi we have the Carolina M 2010 model and looked at the new (2011) tent last week and the only difference we could see was that Outwell have stitched yellow reflective material around the doorway. Not sure if that is the same for the "L" but might be worth a look.
------------- May, Bridge House Marina Garstang
May Willowbank Southport
June Ashes Kendal
July Laverick Hall Halton
July Bridge House Marina
Aug Solway View, Borgue
Sept Willowbank Southport
Oct Wagtail Farm York
Oct Fisherpool Delamere.
Basically, hydrostatic head has gone up from
3000mm to 4000mm.
There is now a darker stripe all around the
base of the flysheet.
If there are any 2010 tents still available,
I would buy one and save a lot of money !
Mick.