Yes, I have the same impression, although for me it is more a balance related question; perception would seem SN3 to sound less than SN2, however, it also seems that this perception may be due to that sharper, more “into the face” SN2 sound versus the more balanced, round and relaxed sound of the SN3. In fact, in my configuration, sonometer in hand and at the same listening distance, they are basically the same marks on the SN2 and SN3 with the pot at around 9 o’clock, between 78db and 83dB depending on the peaks. Additionally, with the pot at about 9 o’clock, when I leave the room, in that listening “from the next room” almost sounds louder the SN3 than the SN2 sounded, or very even, only, again, a flatter and relaxed sound from the SN3 in front of the more sharp sound from the SN2.
I don’t really know which one I like best, whether the sharp sound of the SN2 or the more relaxed sound of the SN3; depends on the type of music, EDM I think better the SN2, the SN3 I find more all-round.
You also have to introduce into the equation the running in and settlement, which, as it goes, changes the initial sound of SN3, from relaxed to sharp and energetic, although without reaching the SN2 sound signature, but increasingly closer (according to my memory), albeit with a much greater delicacy and subtlety, and, in my opinion, with a more precise tonal timbre, closer to the actual timbre of instruments and voices, in the piano test you can see it much more realistic from afar.
Cheers.