There are too many variables at play in the UK to give a hard and fast answer. The Emira is still a relatively unknown/unseen car to the masses at the moment. I've not seen another on the road yet (other than mine and demo cars at the dealer). Contrast that with the Cayman which has been on sale in different guises for over a decade and there still isnt a huge amount of awareness outside of enthusiast circles.
Add to that a very uncertain economic situation and with the cost of borrowing money more than double what it was 2 years ago. Mortgage rates going up which means disposable income for most has been dramatically reduced and peple are just extremely apprehensive about buying sports cars or having a second car when one, more sensible, will do until the situation becomes better.
There's obviously more cars available than buyers at the moment but who knows how long that will last. What will be interesting is when/if base cars become available to order. It could well be that you can get a nearly new FE for not dissimilar money to the base, at which point I'd expect the current glut of cars to start to thin. But thats dependent on people actually wanting the car over a comparable Cayman et al. Personally, I dont regret my choice at all and given I see half a dozen boxters/caymans every day...