i've sharpened enough Tramontina to have no trouble believing 1070 is their standard.. but if i had to guess it'd be higher rather than lower..
In My Experience, their knives tend to be thin and hard by European (commercial, low end) and NOT japanese standards..
i've got a 12" tramontina veggie chopper ('chefs knife') that'll run maybe RC 58-60. It's useful but it's a low end commercial knife.. nothing special about it. I just wouldn't call it 'soft' at all.. in the range it competes in.