Orchid vs. Istanbul — anyone compare these MHDT DACs?

I just purchased the Istanbul from a seller on eBay for a really good price. I really like it, I can't compare it to any of the other MHDT DACS, but I will say she sings a beautiful love song along with my Lyr 3 and Loki.

I'm waiting for a 6SN7 TO 5670 adapter to arrive, so I try some of my 6SN7 tubes on her.

Right now the tube that I have in her is a Raytheon 5670 with the windmill getter

I've really enjoyed the Orchid but have not had a chance to compare it with others. I'm curious to hear if anyone has things to add.

Hi, Its over a year later from OP.  Anyone have any updates, experience, impressions, etc on the MHDTs?  I am contemplating R2R, and interested in any info and impressions on MHDT product line versus Denafrips product line...

And like OP, have same question about the Orchid and Istanbul...

Thanks!

@hilde45
While I don’t normally refer to other forums/threads, page 23 on the Head-Fi Headphone Review forum, thread (MHDT Labs: R-2R NOS Tube DACs) speaks to the updated Stockholm > Istanbul, Orchid, some Pagoda . I’ve only heard the Havana, Pagoda, Orchid - the main differences people shoot for is "which chip" and "SE vs. Balanced/XLR", and tubes can flavor sound in different directions. This thread may help to look around, scroll down some internal scree photo compares too. I enjoy my MHDT Labs Orchid with Philips TDA1541chip, and prefer R2R Ladder DACS for my ears. I have all of these Various tubes and more to fine tune the different models starting with GE 5670 5-Star Triple Mica (neutral but smooth), WE396A Western Electric (soft), or Tesla 6cc42 (smooth, not too veiled over - my pref), Bendix 2c51,  all have different characteristics, good fun, easy to taylor sound to your liking.

https://www.head-fi.org/threads/mhdt-labs-r-2r-nos-tube-dacs.798259/page-23