Financially cheaper yes. I've tried Onshape for 6 months and I didn't find it as immediate or as fast as Solidworks. Particularly when modelling multi-component assemblies.

Onshape monthly price for a pro licence is about 1/3 the price of Solidworks monthly (on finance), for me Solidworks is a clear winner here even though it costs more.

But, Onshape is a revolution in the free CAD space. Perfect for simple products like this ;)

Edit: added last sentence