In reply to Alpenglow:
I've only seen the Vango up in a shop but we've got the WC Hoolie 2 ETC.
Both look pretty similar. The Vango fabric looks newer/more recently developed but I'm not sure how/if that translates to performance in real terms (i.e. just numbers on a website).
My main gripe with the Hoolie is the side door opens up which drips any condensation into the centre of the porch. Looks like the vango opens to one side which would alleviate this.
On the other hand our Hoolie has been faultless for withstanding rough weather and I trust it in wind which makes for better sleeping!