Vitus versus Gryphon

In general, What’s distinct differences and similarities between Vitus integrates amps and Gryphon?
Perhaps, Vitus ri-101 and Gryphon Diablo-120. 
 Thank you
I own vitus sia 025. Demoed the gryphon diablo 300
before going vitus. Both are fantastic but decided to
go vitus because of its midrange warmth that i find
so appealing that listening to to neutral speakers like
magico, wilson and vivid is almost like listening to bbc
inspired speakers, hence the midrange magic. Even 
bad recordings becomes good.

if you like prat, slam and ultra neutrality, go with gryphon.
The SIA-025 as a lower powered, sweet sounding class A amp is quite a different beast from the RI-101 which is a 300 watts class AB brute. (But still excellent) How either of these may compare to Gryphon I will leave to others that have heard both. I doubt you could go wrong with any of these choices however, as they are all top echelon gear.
Thank you so much guys.
I like Prat and musicality. I can deal with tone such warm or neutral but won’t like slam or soulless. I’ve been exposed to sweet and romantic probably because my past gears and CDs so I could con’t or change to new path...
 I have heard both units from 2 diff systems and would like to hear more from the wise.
Here is our take on these two fabulous beasts

in general Vitus gear is sweat sounding, with a perhaps a bit more lively of a sound, with a bit less slam then the Gryphon,  At a few shows the Diablo 300 sounded good but was not the wow inducing sound of the bigger more expensive Gryphon products.

You may want to add the T+A gear to your uber list, the T+A PA 3100HV is one of the worlds finest integrated amplifiers and hits a beautiful neutral point of being a bit on the warm side with excellent detail and a very big holographic sound stage.

Dave and Troy
Audio Doctor NJ T+A dealers

You should definitely consider T+A PA 3100 HV on that price range
Gryphon all the way! Plain musical
I heard the Gryphon Diablo 300 and T+A PA 3100 HV driving Magico A3 speakers. To my ears the Gryphon Diablo 300 was more detailed and opened compared to the T+A PA 3100 HV. Maybe with different speakers the results would be different.

I owned the Diablo 300 for a while and have listened to the Vitus sia-030 on Focals like I own.   I think that supermerio’s comments above are “dead on” on all counts.  I personally think that if you have neutral speakers that the Vitus sia series is really nice.   If you wants tons of bass control and liveliness the gryphon Diablo is it.  All of them are great imho.  Happy hunting!
A manufacturer that doesn't get much coverage stateside is Grandinote. Take a look at their Shinai or Prestigio integrated amplifiers should lower power output be acceptable. 

I also second @thyname 's recommendation for T+A ,  as well as both of your choices in Vitus / Gryphon.

All the best.