Lotus' (and Mc Laren's for that matter) goal is more simple than the C8's goal - the goal of the first two is to just be the best there is at road racing, not oval track or drag racing, but more real world driving conditions, period.
In a project aimed at improving fuel economy of new generation vehicles that I was in charge of before I finally left my last job of 32 years, we invited in for interviews both Lotus and Mc Laren engineers to provide us with their best projections of where light weight, high strength, durable materials technology and cost were headed for future use as prime technologies for improving fuel consumption. They were both very impressive with their "can do" attitude and the height at which they set their goals. We also interviewed GM and some other mass market vehicle manfacturers and what they provided in comparison was lame and not very far reaching (but no doubt, they also didn't tell us everything they were capable of either - but there was a big difference in their goals compared to the specialty manufacturers).
GM's goal is to create a very good sports car as a halo vehicle and push the envelope some but with an eagle eye on cost and not that much innovation - and to generate sufficient profits to keep them in their product mix with the Corvette.
So the specialty manufacturers really should not be compared with the Corvette given those realities and differences in focus. The specialty manufacturers' vehicles do cost far more than the mass market vehicles, and the rich can afford the best there is, but the speciality manufacturers provide a very important function for improving future products in terms of better fuel economy, which goes a long way to improving all of our lives. I respect both Lotus and Mc Laren greatly. They have some of the best, most innovative and hard driven engineers I have ever met and interviewed among all the vehicle manufacturers.