I already have? I have the Genos and sx900, had the T5 here up til only a month ago. they behave the same as my s970, pitch bend affects lowest note only. Also have the sx700, A5000, sx600, etc etc here.
You said s950 bends all the notes? then it's not the super articulated one. Thats how they did it before s.art, yes. But the s950 does have s.art PedalSteelAmp, and it *should* bend the lowest note as well (I don't have an s950 atm to check). Note the s950 has 2 different "pedal steel"; one is S.Art and should bend the lowest note, the other is not, and will bend all notes.
But 100% PedalSteelGuitar is not the same voice on sx900 vs Genos.