JP157 vs JP70

I’m trying to move deeper into 7 strings world and I’m looking for Sterling JP157 and JP70 guitars.
Unfortunately I have no possibility to test any of those where I leave, so I would like to ask the ones that know these models whether there is any other difference between the two, except active pickups on 157. I’m interested by: playability, sound, tremolo, construction, quality

Thanks you in advance.