My figures weren't meant to be taken in isolation since they were based on the NEDC claimed efficiency, which has a mix of urban and highway driving.
The idea was that it's an apples-to-apples comparison because both are quoting the official NEDC figures from the same manufacturer quoted in the same brochure, so even if they are optimistic, they'd have the same amount of "optimism" built in.
You can also see the PHEV ending up being more efficient from another data point as well (again official sources so add salt):
H6 HEV FWD: 5.2 L/100 km
H6 HEV AWD: 5.4 L/100 km
H6 PHEV FWD: 5.0 L/100 km
H6 PHEV AWD: 5.3 L/100 km
All figures NEDC, and low battery scenario for PHEV.
Based on the above data, you can see that the efficiency hit in going to AWD from FWD is much higher compared to going from HEV to PHEV. Both variants for the PHEV have the same battery pack, meaning the pack is similar in terms of weight, yet the FWD version of the PHEV is more efficient than the HEV.
It would be really interesting if someone does real world testing for all of this and reports their finding, but unfortunately, Pakistani market isn't getting the HEV AWD nor the PHEV FWD variants.