Short answer is I don't know. I installed both of these WET-11 set ups for friends using the stock ARM software. After reading some of the problems encountered by others I was reluctant to try tRio in someone else's house.
All that said, having seen my set-up (wired ethernet) they want to try tRio. So in the next week or so I will give it a whirr. Incidentally, I got the best range on the WET11s using channel 1. The default is channel 11 which was hopeless in one of the installs. Cheapest place I found for WET11s was Ebuyer: £58.74 inc vat

Hope that helps. Cheape