Hi Kezo in answer to your question, no difference at all, even when towing the caravan uphill, are you considering a Hybrid, the Ford Kuga FHEV has an acceptable AP, the PHEV is over priced unless you have a home charger, solar panels and tow a caravan. Personally we did consider the FHEV, the wife made the decision to go for a PHEV.
Unfortunately I have suffered a brain injury and occasionally I get confused and often say the wrong thing.