Testbenches in myhdl or cocotb

Are there really any benefits of using cocotb for simulation when one use myhdl for coding ?
I guess I could do unit tests in python myhdl for simulation (did not try it though).
Cocotb also provides an easy framework to simulate verilog/vhdl code with different test cases.

Is there any benifit in using cocotb framework when I already have myhdl design for verification?
Can someone experienced through some light on it ?

Thank you

I actually started with cocotb for verification of verilog designs, but then shifted to MyHDL for verification and HDL Design. MyHDL is a great tool. Do checkout unit tests.