DiffusionGemma has poor variable transparency due to high opaque serial depth, but this can be mitigated by an interpretable token bottleneck, reducing serial depth to 1.1X that of Gemma 4. Algorithmic transparency is more challenging in diffusion models due to dynamic token changes, though case studies reveal novel phenomena like non-chronological reasoning and intermediate-context reasoning. DiffusionGemma is found to be similarly monitorable to Gemma 4.