Bluetti AC200L outperforms on raw capacity and output per RTINGS and Notebookcheck data, making it better for stationary backup, while EcoFlow DELTA 2 excels in portability per owner reports on CNET. The 2048Wh vs 1024Wh gap gives Bluetti a clear edge for extended outages but at double the weight. Delta 2's faster recharge and lighter build suit travel better.