Well..... Nissan has copied Honda. Their Rogue now also has a 1.5L turbo. Its that engine that has a rating of 30/37.
Nissan also part owned by Renault, who spend 8 days a week asleep at the desk or on strike. I wouldnt worry. Anyone can conjure up mpg figures to suit a narrative...
The big bulk of Honda's 6G sales will almost certainly come from the top two trims, which as you know are Hybrid-only.
That said, the 1.5Ts may well be gifted with updated software to make them better. Granted the mpg calc's vary between the USA/UK, but if I can get mid-40mpg (and more) in mine, then stands to reason that the 6G's can and will better that
(Although we in the UK will only have the Hybrid, not 1.5T).
Edit/Update
The Rogue has a paltry 3-cyl engine too - the Honda is 4.
No surprises for guessing which will give up the ghost first under the strain!!