Although both these cars are similar in many ways, there’s one area where they take difference philosophies. And that’s in the way their hybrid systems are configured and prioritised. While the Lexus is more of a conventional hybrid with the electric motor doing a lot of the heavy lifting, the Volvo is what’s called a mild hybrid., As the name suggests, that means the electric power is limited to a 10kW boost when taking off or when the driver requires maximum acceleration. A mild hybrid layout does still operate the stop-start function and can harvest energy when slowing down, so it’s still a worthwhile slice of tech, but it won’t affect fuel consumption as much as the Lexus’ full hybrid system. Reliability is a bit of an unknown with any new car, but it’s fair to say that the Lexus’ reputation will count for something come trade-in time. Not to mention that, as the more hybrid-focussed of the pair, the Lexus might also be a little more future-proof.