I'm just looking at the Q2 replay on Kayo now.
At 10:06 to go in Q2, after NOR and RIC post their first times in reasonable wet conditions on inters:
RIC - 1:46.393
NOR - 1:47.157
RIC is about 0.75s faster.
However, he s behind NOR on track (NOR posted his time first).
Rain started getting heavy after NOR completes his second sector on his next lap (setting the fastest second sector). At this stage RIC is starting the second sector.
NOR's first lap time is dropped all the way to last for about 1-2 sec (due to all the people in front of him on his second lap having better conditions with the water being cleared off the track).
Then he posts his time with 08:50 to go in Q2
NOR - 1:41.821
RIC's first lap time is now last, and he is trying to post his second lap, having had 17s more of heavy rain than NOR experienced.
RIC posts second lap at 08:33 left in Q2 (17 sec of track position behind NOR)
RIC - 1:44.355
NOR doesn't attempt another fast lap, so we don't know what a subsequent time from NOR would be in worse conditions.
So it looks to me like RIC got the worst of the conditions in the second timed lap attempt. He was faster in the first attempt, but that may have been a "sighter" lap for both cars also, so maybe not representative either.
I don't think an "apples to apples" lap comparison can be done between them in this Q2 session.