Re: Can a fender duo sonic hs play hard rock/ metal?
I assume you mean the new Mexican ones, with 24" scale? They sure can and they're very good guitars.
As for an HH Tele vs. HS Duo Sonic... In general play both, the Duo Sonic will probably feel more comfortable and thanks to the thinner body should have better access to high frets. It's really hard to generalize sound differences, but in my experience with 24" scale vs. 25.5" , there will probably be less snap to high notes, but more presence/attack to the bass and a bit more jangle overall. Don't know which neck profile you'll prefer. RE: pickups, I prefer a single in the neck for my own playing, but a Jazz is also a very good pickup and would do well for Metal.