Choose Gewerbeschule if it's CHF 100 cheaper per month, the commute to HB is 6 min shorter — more central and connected, there's a denser restaurant scene.
Choose Weinegg if it's noticeably quieter (45 vs 56 dB), it scores higher on safety (9 vs 7/10), it has better green-space access (6.5 vs 3.5/10).