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
@mboldda1  - Thank you.  It was nice to read about something else besides what all the reviewers are taking turns reviewing.

I've decided to go another direction due to a sale that brought an item down into my price range.  I wish I would have seen the sale sooner, but oh well, I learned a lot during that time.

Thanks everyone!

jwlaudio
@jond 

I didn't know you cared!  hahaha

I ended up with a First Watt F8 (Picked up 30mins from me =) and I was able to get a 30% discount on a new PS Audio BHK Preamplifier.  I found out about the PS Audio sale after I bought the First Watt F8.  I could have ended up with the PS Audio BHK 250 + BHK Pre, for about $1k more.  The BHK Pre is getting built right now, so we'll see how it sounds.  So far, the First Watt F8 is getting better and better as it burns/breaks in... it is also on the bottom shelf, but near my thermostat and my place is freezing in every room when it's on. This amp runs HOT! lol
@jwlaudio that's great I've heard First Watt amps a few times at shows always sounding great you basically can't go wrong with a Nelson Pass amp. And a tube pre and great SS amp is a fantastic combo for many listeners. And yes those class A amps do need extra ventilation get it away from that thermostat lol!