As you know, we don't have much struts options for the AWD sedan - only OEM Tokico and cheap aftermarket KYB Gr-2. Though, as we have the same suspension as AWD coupe we can use their struts! And they should be less soft (coupe is heavier), especially if taken from the G37xS '11+ coupe (it has different struts than G37x coupe).

And you can consider G37x sedan struts too, as it is heavier either, though not much, so there can be no difference in struts (yet they have different part numbers).

It might be interesting option for those who run aftermarket springs and don't like OEM soft struts. As for me I run OEM G35x springs made for Russian market - they have the same ride height as USDM G35x, but stiffer (struts are the same for all markets). And I would love to pair them with more stiffer struts but I don't trust KYB Gr-2.

The only issue I see is the difference in the weight distribution between the coupe and sedan, but it might be not significant and can affect only springs, not the struts.