I think the Exige will hold it's value better than the Emira. There will never be another road car like that again, not with EVs.
Also there will be more Emiras around eventually, Exiges are rare.
Yes the Emira will be a case of move it quick to get back what paid or some overs. I think from rumours and whispers they have now sold around two years worth of production on Emira and as its early days at this rate it looks to be extremely popular and I forsee the 4 pot 60k car been very popular. I think any overs potential will only be on first deliveries in the first six months as once upto speed were gonna start seeing plenty on the roads due to how affordable it is for what looks like a supercar.