The "which is better" argument has raged back and forth on the Lotus and Emira Facebook groups and other forums. From my point of view it's of limited benefit. Are we talking about on-paper 0-60 or torque, real world drag race or on track (and which track?). Or how much can you tune each one, or how easily. It's fine to discuss the facts and ideas and opinions. But aside from the pub bragging rights on the numbers, it's a largely subjective and personal thing.
I don't want to tune it, I want a manual, I like the V6 sound, emissions and taxes aren't a big factor for me, and I don't want to wait an extra 6-12 months for an i4. But I respect that other people have different criteria and the i4 will suit lots of people.
The great thing is we have a choice, and both V6 SC and i4 turbo have prior history in Lotus cars.
I can guarantee I'll have done hundreds more laps and be miles ahead of any i4, by at least 6 months