Manley 300B or Manley Steelhead

I just received my Manly Neo-Classic SE/PP 300B amps. Love them. Clearly a step up from my previous Rega Elicit integrated.

I am planning to purchase my preamp later this month. I am thinking of either a Manley 300B pre or a Manley Steelhead. I do listen to some vinyl but the majority of my listening is digital.

I guess I am asking: How good is the linestage of the Steelhead versus the 300b?

PMB