Kinki studio EX-M1, EX-M1+ differences... vs Denafrips Hestia/ Hyperion combo?


I've been reading up on some Integrated Amps and Pre-Amp/Amp combos lately but have some questions.

The following is an excerpt from SoundStageHifi:
The original EX-M1 was introduced in 2017. The newly updated EX-M1 — without the “+” — costs $2398 and includes, among other things, changes in the power supply, capacitance, and the volume control, the latter now using a MUSES72320 controller instead of the previous relay-based control. The EX-M1+ is essentially identical to the upgraded EX-M1, but adds a preamp-stage output and a home-theater bypass to entirely bypass the preamp stage.

That last sentence has me a little confused. 
"The EX-M1+ is essentially identical to the upgraded EX-M1" - What is the "upgraded" EX-M1?  Does this mean that the latest version of the EX-M1 has all the updates that they just covered preceding this statement?

The 2nd half of the statement says " but adds a preamp-stage output and a home-theater bypass to entirely bypass the preamp stage." - You'll have to excuse my ignorance.  Does this mean that I can add a pre-amp in the future and use the EX-M1+ as a Power Amp?  Also, does this mean that I cannot add a pre-amp to the EX-M1 (non-plus)?

At this time, I don't have hard to drive speakers, and I don't foresee having something like that anytime soon, so I was also considering the Denafrips Hestia/Hyperion combo.  I haven't seen any reviews comparing these 2 company's offerings... any feedback is appreciated.

jwlaudio
@jwlaudio 

Not sure but something in the way Bascom designed the volume control circuit.  Just know that between a friend and I we tried three different units and almost a dozen SE amps.  If it causes a problem at least you have the 30 day return.  
@jackd

Thank you.  I have 4 amps, all with SE inputs so if that volume control is unbearable, I guess I'll have to think about returning it.  I do use the volume control often since I use this system from multiple sources.  I really hope that it works out for me though.  I've been hearing such good things about this BHK Pre.
@jwlaudio 

One way around it once you figure out the "sweet spot" volume for each source is to mute before changing the volume level then un-mute.  Anyway even though it doesn't have all the remote conveniences and input options of the BHK I much prefer the sound and lack of quirks with the Supratek Chardonnay at a far lower price.  Same is true of the Don Sachs preamp.  
@jackd
Just wondering how much better your BHK/EX-M7 and Chardonnay/EX-M7 combos sounded than your EX-M1 and in what ways?

A while back I tried to downsize my tube pre/tube amp combo to the EX-M1 (original) but although the EX-M1 was very impressive with low noise floor, dynamics, detail, speed, smoothness, PRaT etc, I just wanted a touch more palpability, organic-ness and ended up selling the EX-M1. Also the EX-M1 had way too much gain, even on low gain setting.

I’m now thinking the EX-M7 with my tube pre-amp might get me to where I want to be. Or, if I need to lose more gain, the Athena and EX-M7.

Also, I can’t find how much gain the EX-M7 has, do you know?

So much information to sort thru here.  May as well add to the fog.  
1st let me say I really, like the ‘unity gain’ style of preamps.  I like the simplicity, the feel, and the quality.  Being fed by a Benchmark Dac3 HGC, I’ve run direct, 0,10, and 20 db attenuation, into the Hyperion & thru the Hestia/Athena.  I have both.  
I find the Denafrips transparent to the source voiced primarily around depth, tone, and dynamics.  They have a certain gravitas and plenty of ‘drive’, particularly in their size/price catagory.  The voicing may be in regards to the class A biasing.  The case can be made that they are unique exquisitely mfg products. 
I run Roon thru a Nuc filtered thru a top end Audio Magic conditioner I’ve modded with Jupiter copper caps on the receptacles.  I’ve 3 dedicated circuits w/10g wiring, & spent a lot of time rolling caps thru the filter stages, Jupiter’s, Cu V-Caps, Duelands, Mundorf SGO, ect… So I would say that my digital source preference is shaded to what the Jupiter caps bring to the table.  

My room is big, 800-1200 sf. and I’ve rolled at least 9 pr. of speakers thru the room, but currently live with the Zu DW’s with (of course) Jupiter caps.  Let’s leave the analog, tape and tubes aside for now.  
The voltage input of the Dac3 does effect the voicing of the system, in general the lower the voltage input the more perceived warmth with or without the preamps.  The less voltage the less attack, or leading edge.
Dac direct, at full output, you can introduce a touch of the dreaded digital glare.  Just a touch.

I understand and have experienced the perceived warmth of the Denafrips voicing as relates to digital and have found it to more naturally align with my analog sources.  Both cassette and vinyl sounded more at home with the Denafrip amps, until…

I brought in a subwoofer to properly ‘load the room’.  I’ve a very good upper corner placement that has enabled a Rel T9i to bring in the 30-40hz and ‘what do you know’, everything has just fallen in place.  My room now sounds the best I’ve attained in over 20+ years of playing around, with tubes and power supplies and speakers, and preamps, ect…

i luv my Hyperion/Hestia. (-;

Now if I could just find the order of tubes for the downstairs system that DHL says was delivered yesterday.