Feature Level 9.3 appears to never have actually worked because shaders are compiled as straight 4_0 instead of 4_0_level_9_3. That being the case, baseline against 10_0 instead.
Feature Level 9.3 appears to never have actually worked because shaders are compiled as straight 4_0 instead of 4_0_level_9_3. That being the case, baseline against 10_0 instead.