Completely different. Werner's game isn't suited for this league. There is some things you can coach and some you cannot. I don't expect any manager to come in and improve Werner's technical ability in tight areas. This is something you develop as a child, not in the prime of your career.
Ziyech wins us points against mid table/bottom half clubs. Not to mention he has a element in his game that can be useful against low blocks. There is genuinely no point in Werner unless we play Southampton 38 times a season.