Pros and cons, but Victron is more modular. For example, the MPPT is separate and the inverter is only an inverter. With Sunsynk, my 8 kW inverter contains two MPPTs. Then there's Victron's comms component (Cerbo GX), etc. I'm not arguing either way: pros and cons, as I said. In the end, the Victron and Sunsynk designs are fundamentally different, with Victron being transformer-based, while the Sunsynk relies heavily on high-power switching electronics.