An awesome afternoon at the hospitality of the guys at Hethel, you'll likely know better than me that they're great guys, know their stuff and passionate about Lotus (no question unanswered, no ask unfulfilled).
I tried both the i4 touring and the v6 sports, both were an assault on the senses (exactly what I would have hoped) and took me the 2 hour drive home to really gather my thoughts (I'm obviously not an expert in these matters either). I don't think you could go wrong with either car and I have been left with even more indecision than when I started the day (some of the new colours on offer for the i4 are super nice too, personally zinc grey a winner).
It's hard to summarise but I think they're different cars for different purposes, it wasn't until I got home that I realised that in the v6, I didn't once look at anything else in the cockpit, the drive was so all consuming (in a good way ofc) that I was just emersed in the symbiotic relationship between man and machine (hoping my Lotus passenger doesn't comment on my gear changes). The i4 was certainly a little more relaxed, and I engaged more with the cockpit, it was much easier to cruise and have a chat in the i4.
The touring chassis on the i4 certainly felt great and I'd suggest comparative to the sports chassis in the v6 but without the hardness when it comes to bumps. I really missed the gurgle of the v6, the sound track of the i4 less engaging perhaps inevitably. I wasn't overly impressed with the i4 gearbox, it felt a bit laggy, less pronounced and I think I would have needed a lot more time with it to really understand its personality and get the most out of it.
My conclusion then (and I suspect not surprising), if you want a true daily driver, or you'll be doing a lot of miles then the i4 likely the best choice. However if you're going out for an hour or two on the weekend to get the blood racing, the v6 does that a bit better (and as my Lotus passenger told me, my smile was much larger in the v6). Again though, the i4 will too but with optionality ...
One other comment that stuck with me was that the production of the v6 was stopping/stopped, thus likely to create an interesting situation with residuals, as demand would assumedly exceed supply.
However I'm now in a (wonderful) dilemma myself...