Hi KareninKC,
She’s right that the ILD doesn’t matter when you are testing a mattress because with good testing then your body will tell you all you need to know about pressure relief and support/alignment. Of course if you are looking to approximate a mattress through other sources then of course knowing the ILD can make a difference.
The ILD target range of the Savvy Rest layering (soft, medium, and firm) is in post #7 here.
Talalay may also be more likely to feel like the Aireloom than the Dunlop (I would ask to test this if they carry it).
Phoenix