When point to point application, the solution 1 can be more than 5km long distance. Solution 2 can be more than 200m (In the condition of simple external circuit). When the slave nodes number increases, the influence on solution 1 is not obvious even up to 200 nodes in thousands meters distance. For solution 2, if simple external circuit designed, it only supports 20 nodes with shorter distance less than 100 meters

The maximum of solution 1 can be 500 nodes. The maximum of solution 2 can be 30 nodes at about 100m. Please notice that solution 1 supports any topology such as star network, stree network, even lines in roll (single line or twist lines), but solution 2 can not support.

Solution 1 is up to 9600bps (Customer valid data rate)

Solution 2 is up to 38.4kbps when standard version, and 115.2kbps in special version (Customer valid data rate)

If large nodes needs, the solution 1 can be the lowest BOM cost choice with highest reliable ability.

If only point to point application on short distance less than 200m, the solution 2 can be best choice.

Solution 1 doesn't use inductor to isolate the capacitor, which is convenient and low cost in engineering field.