Is the main difference between them the way they are fixed?
Stria. "Once the first board is fixed level, the shiplapped joint on the next extra-wide, 4.2m long board is fixed to the top of the previous board and can be joined on or off the stud."
"Linea weatherboards are back bevelled to sit flush with the stud." [Quotes JH website]
Both are JH Scyon and both come with a 25 yr warranty if fixed correctly.
Former is 14mm and later 16mm.
The composition of the material from what I can tell looks the same. So I'm forming the opinion that the designer wants to use Stria because it is easier to use - on or off the stud. Mostly brick with some cladding externally and within the balconies/decks.
Being 2mm thinner I suppose it is a tad lighter as well.
Just to develop a sense of paranoia if this stuff becomes damp from behind - south wall above garage, (but not too likely in Brisbane) does it handle moisture well?
Thanks.