I very much doubt whether either will survive as Stansted is not a good starting place. The start up costs and load factors required to make it pay will be hard to achieve especially with a looming slow down in the economy causing business class to suffer.
A B757 {newlines} is not a suitable aircraft for business class type seating.
Any tech problems early on will not help as other aircraft would not be available.
Why do people with brains and money even consider this type of investment???