There's no real way to know definitively.
I've found with some complex lowii hybrids, if pure lowii species is one of the primary parents then there's a good chance of getting lid hairs N. (lowii x (A x B)).
I've seen two clones of N.lowii x (spathulata x maxima), the one I have clone (b) has lid hairs, clone (a) does not. So it depends on the clone.
There's cases where lid hairs, come and go. Often happens to me with N. lowii x truncata, as can be seen in this pic, three consecutive pitchers on the same plant
And then on another N.lowii x truncata clone, they are seemingly always present.
I found it also makes a big difference on who the other parents is, as has been mentioned N. lowii x boschiana, makes no lid hairs from the plants I've seen, whilst in almost direct contrast N. lowii x spect, has an abundance of bristles.
but in general most lowii F1 hybrids tend to have some hairs to some extent.