Choose Wipkingen if it's CHF 100 cheaper per month, the commute to HB is 16 min shorter — more central and connected, there's a denser restaurant scene.
Choose Witikon if it's noticeably quieter (40 vs 52 dB), it scores higher on safety (9.5 vs 7.5/10), it has better green-space access (9 vs 5.5/10).