Increasing the length of a copper wire via electrolysis
The two arrangements would produce identical results, because the copper wire conducts electricity so much better than the electrolyte solution.
However, the second arrangement is more practical because no joins are needed so it would be more reliable.
Generally, the surface area of the copper anode should be similar to the cathode which is to be coated to avoid concentrating the current unevenly, so increasing the anode area would probably help shorten the coating time somewhat, as it would avoid oxygen being evolved from the anode which can happen if the anode area is too small.