AC Regenerator

Interesting topic !! I jumped in higher end after 20 years of smaller experiments with audio gear. I am one who is using the latest PS audio P20 with the following gear:
ARC preamp ref 6
ARC phonostage ref 3
ARC power amps 150se
LINN Klimax DS
LINN klimax turntable
Sonus faber Amati

Before I hooked up the system with P20 all the above system was on Nordost platform which was QX4, QRT, QB and the Qkore. My cables are Nordost V2 and Odin2. 
I must say Elizabeth comments on tube amplifiers with regenerates is fully noted and its seem correct.
I had notice able differences between the Nordost and P20 setup. I personally preferred  the Nordost setup where the bass and tonabilty with soundstage was much better than the P20. I am surprised and it left me with a hole in my pocket. Over where I am residing in Asia  there is no free testing period....only 1hr of listening the most.
Anyway the P20 is still new with some 4hrs or so and the entire system is under 150hrs of operation since installed. It is definitely premature to gauge however this is my current predicament and assessment. 
I dont know what to expect and at the moment I am not sure which way to go.
Confused.... any suggestions?

Give it 500 hours, it may change and it may not.

In all my power conditioner experiments, I have noticed preamp sound better on NOT balanced power. 120V0V sounds better. The balanced power from my Furman REF20i and my personal preamps (I own five) the preamps tend to sound cleaner, but less 'full' in the midrange on balanced power. And I like them on regular 120v/0v neutral AC better.So my preamps are conditioned from the Furman conditioner, but not via the balanced lines.No problem for sources with balanced power....

And then,
Worth?
The whole system was improved?
About how much per cent?
Which brand is better?

That’s what I asked
Thanks a lot to who was objective in answers.
Thanks to the others too.

Hi I been reading all you guys responses.
Im a retired mad scientist from many govt and reaearsch areas of expertise and also an audiophile and musician.
Well im here to tell you all if you just buy a good big UPS battery supplied medical grade line voltage system your power will be a pure sinewave like you wont belive, its got to be a true sinewave not a cheap version unit. they dont cost as much as the stuff your talking about and we used them in Neclear reactors,MRIs and super critical analysis equipt all the time with excellent results.
yes the incomming line is garbage especially with all the new switching PS oscillators noising things up. So you cant get purer power than a properly modulated DC source. I run a few 8D 12 volt batts X10 =120 volts and a Techron Gradient amplifier(Crown) for 10000 watts of pure power where i can tweek the 60hz up and down at will and avoid inductor phase shift .
The E bag medical grade 5kwatt ubits are reasonable cost try it and see.
pardon the typing I got parkinsns.

oh I also remembered that tripplite made some super units that you can monitor and control with your PC and they go cheap from the computer server world often just needing new battery banks. Sola alo make some nice simple units. The Techron way is just my wierd method of  doing it,