Ridge, we had a Zeph 2, well actually we had 2, one was the lightweight larger version.
It is a great tent, good value for money. The reason we ended up getting another tent was because we wanted more head height.
I don't know anything about the Alpkit Ordos.
At the moment we have an MSR Elixir 2, £200 but over 2kg. We love it because of the head height right across the tent, it is very spacious and I don't mind beefy having to carry the extra weight