I just moved up from a Shunyata Zitron Cobra to Zitron Anaconda (used and broken in) and the difference is staggering. I haven't heard the Zitron Python, so I'm no help there.
I'm using a C19 1.75m to a 7-8 year old Hydra 8. From there power is mostly older Shunyata: Python CX (CJ preamp) and Python Helixes to the sources. One exception, is Kimber for the digital. A Pallaian PK10 to the DAC and PK Gold to the music server. I find that Kimber loves digital (or digital loves Kimber). Mainly Transparent Ultra and Super RCA's. Siltech 550 speaker wires.
Anyway, the Anaconda moves you up to the 5th row from the 20th. Everything is clearer and very musical. There's more bass and it's very well controlled. Top end more open with no harshness or grain of any kind. The background is silent and instruments sometimes jump out of the silence. All my vinyl and digital music is new again.
Last thought... It's ridiculous that after spending so much money on speakers and components that it should be necessary to spend thousands more on power cords. But what a difference!