In this quick tip we will have a look into how to extrude a curve in Rhino the "right" way. We'll see how we can keep the most amount of flexibility when designing.
But we can play with extracted isocurved in 1st option as it gives continuous curve to use for further division or working. Also the flow will have more flexibility in option 1 because it is single continuous surface. Even you can split the option 1 with split _isocurve command to achieve option 2. Actually it depends on the need but your argument is also valid for that situation.
