WinRM or SSH for Powershell plugin?

Hi.

I have setup a powershell plugin with WinRM successfully and it's pretty easy. I was wondering if SSH was faster or slower than WinRM?

I currently have OpenSSH 6.8p1 installed on Windows 2012 and I can ssh in as Administrator just fine (as a test)

But when i try to add a host via SSH, it fails with

com.jcraft.jsch.JSchException: Algorithm negotiation fail (Dynamic Script Module name : addPowerShellHost#16)

Any ideas on what that error is? Is my ssh configuration wrong?

It seems to be supported but there's no documentation in the PDF for the powershell plugin. Any ideas?

is WinRM just infinitely better than SSH in this case?

thank you!