The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The Strain Gauge Custom's compliance is 10 cu against the Strain Gauge SG-210's 15 cu and its output voltage 0.7V RMS against 0.3V RMS. Both share channel separation (25 dB) and cartridge type (Strain_gauge).
The Strain Gauge 410's compliance is 20 cu against the Strain Gauge SG-210's 15 cu, its output 5.0 mV against 0.3 mV, and its tracking force 1.9 g against 1.8 g. Both share channel separation (25 dB).
Both turn up in the same documented systems.
Strain Gauge SG-210 vs Lyra Kleos
The Kleos's output is 0.5 mV against the Strain Gauge SG-210's 0.3 mV, its compliance 12 cu against 15 cu, and its tracking force 1.7 g against 1.8 g. Both share stylus type (Line_contact).
The LP-S matches the Strain Gauge SG-210 on compliance (15 cu), output (0.3 mV), tracking force (1.8 g), and stylus type (Line_contact).