The ETS Bus Monitor displays telegrams at the raw frame level, whereas the Group Monitor presents them filtered and formatted at the Group Address level.

This is exactly the distinction. Bus Monitor gives a raw, low-level view of every frame on the bus, useful for diagnosing low-level issues such as missing ACKs, parity errors or unexpected source individual addresses. Group Monitor gives a higher-level, business-oriented view in which values are decoded per DPT for each Group Address, ideal for verifying that pressing a button actually sends the expected telegram.

Reach for the Group Monitor first; only fall back to the Bus Monitor when you need raw frames — the Bus Monitor floods the view quickly and is harder to read on a busy installation.