Hello Rolandfan,

I'm using GW-7 and I'm pleased with its sounds. You can edit tone and save it in user tone section.
As fas as I know, E-09 and GW-7 have the same sounds but you have many functions for sound tweaking in GW-7 (Its layout and appearance are nicer and more professional).
GW-7 has USB port to receive and transfer data with PC (style + midi song).
Regarding editing drum kit, you can change to fit your flavour through EMC Style Works Universal.