Is there any consensus among the connoiseurs on going the Skylar or Sister route? I think it's a really hard decision. The scene with Sky at the end of E6 is just fantastic but that cute photoshoot with sis isn't something I would want to miss either.
If the WT is to be believed both aren't totally exclusive but still.
Definitely no consensus on Jessica vs. Skylar. Each has their fans who aren't interested in the other. It was not an easy choice for me because I like them both equally. Skylar is more beautiful, Jessica is more adorable. Both have their singular appeal.
I don't know what the WT says but for now they are exclusive. Playing both paths in separate saves is a lot of replaying, but Ripples is good enough that maybe this works for you. I'm waiting until it's finished, following the Jessica path all the way. Then at the end I'll decide whether to go back and play for Skylar.
If, as I expect, it isn't too long before the paths merge again - depending on your choice you might get both if you want them: my theory is choosing Skylar permanently locks you out of options for Jessica, while the other is seen positively by both; Skylar respects you for sticking by someone you've come to love as a sister, Jessica loves you for being willing to sacrifice for her. Choosing Skylar, though... That will obviously make Skylar happy, but Jessica will feel betrayed - then there won't be too much missed Skylar content. And if am wrong on any count, I will also play a Skylar path to the end.