add timing feels great. added boost felt pretty good too, more lowend torque, but it also screams up top too.

personaly i would not want to run lots of boost with low timing. but i would also not want to run lots of timing with low boost. i kinda like an even trade off.

im sure both set ups could come out to the same power wise tuned properly. it would more mainly be down to you, which on feels better to you.