The GT4 RS car is a more lively and nervous car then the 991.2 GT3 RS.

On the other side the GT3 RS is a more stable and faster car. 

On the edge I personally prefer the 911, as I know well how it reacts and I like that at the limits it  reacts progressively, unless you are really way too fast.  That suits my over 50 fear management abilities. 

On long distances, the GT4 RS is not a problem if you use ear plugs. A very easy and practical solution. Suspension is more comfortable and it is more fun on speed limited roads.

I also do about 8000 km a year to/from the tracks.  Usually over 600 km to get to the place .

I like the technical parts of the 992 GT3 RS.  And I find the car to be much more appealing in looks then the GT4. No comparison.

I was offered an allocation for a 992 GT3 RS a few weeks back. I declined for the moment. I want to stay a bit longer with the GT4 RS. Also thinking the 992.2 GT3 RS will have a proper engine upgrade.