LinLai WE 300B or the LinLai Global Elite Permaloy 300B tubes ?

Since Elrog was brought up earlier in the discussion. Photos of their tubes...

https://www.monoandstereo.com/2021/08/elrog-tubes-five-year-anniversary.html#more

OK...  I almost left this discussion as it seemed to take on a new life on amps, preamps, upgrades and the like.  However, I guess sometimes things go that way naturally...  In my opinion, it's better to start a new thread so others can tie-in to that and comment/learn.  That said...
I have about 250-hours on the LinLai Permaloy 300-B's and they have opened up nicely.  While they sounded good right out of the box, They seemed a bit edgy in the treble area to start out.  Now, they have in a word, blossomed...  The treble has smoothed and is not edgy yet retains great accuracy.  No sibilance.  I have always liked my First-Watt SIT-2 solid-state amp for it's terrific detail, triode-like sound and BIG expansive soundstage.  It's my most-favorite solid-state amp.  I had most of that in the past with the Sophia Princess mesh-plates except for the expansive soundstage, and while the Sophia Royal Princess was a definite cut above the Princess's in all respects, the LinLai now surpasses them.  The LinLai's now match my First-Watt SIT-2 for that big soundstage.  I like it !  Also the LinLai's have a great realistic sounding mid-range which in my opinion is where the rubber-meets-the-road so to speak.  One other area I've discovered with the LinLai's that I'm having trouble describing is the music definitely has more "body".  There seems to be more weight or "heft" to the music over-all and not just in the bass-area.  Another nice quality. 
One other thing I've done is checked the bias after about an hour of warm-up every time I've done my listening and at first, I was adjusting, re-checking and fine-tuning.  Now in the last several times I've checked, it appears to be spot-on.  I always reference the line-voltage when doing bias adjustment as I adjust based on nominal voltage.  Luckily, where I am in Florida, I've seen the line-voltage vary between 118V and 121V with it setting at 120V most of the time no matter what time of day.  That in my opinion is good...  I know listening is a subjective experience and with each piece of equipment/component, your "individual mileage may vary", so to speak, however with my SET-up, this is what I'm hearing.  
I don't know how much more these tubes will change with more hours, however I like what I'm hearing, so far...  More-to-come...  

@liquidsound Thanks for the update. Very interesting and encouraging.

Appreciate the review. Funny, but I could almost repeat word for word my impressions of LinLai Elite mesh plate 101d. Could it be there is a 'house' sound for LinLai Elite.

I'm now much closer to pulling the trigger on Elite 300, the only remaining question, what about durability? It would be nice if LinLai as a new player in high end tube market offered a two year warranty. I can only offer my Linlai 101 has well over 500 hours, so far so good, just had them tested the other day. For what its worth, I periodically have all my various output tubes tested (three different amps and two preamp). Pays off not having failure that may take out various components. I can say all the Shuguang, Psvane and this single Linlai have always checked out, no failures.

Thanks Guys for enjoying the impressions I've found with the LinLai Permaloy 300-B's.  I'll do another impressions review after I get more than 250-hours on them (like at the 500-hour mark) to let you all know how they sound in my system.  Now I'm in a quandary !  Do I go for the LinLai WE replacement 300-B's or go for the U.S. WE 300-B's ?  The U.S. ones are notably more expensive, however they do have a 5-year warranty on mfg. defect only.  So if one fails, or I guess doesn't meet "spec" they may replace it.  By the way, Sophia only does a 1-year warranty (at least the last time I bought) if you pay the higher price.  Perhaps I'll wait a little while longer to see how these Permaloy's sound and last.  I want to get some of these expensive 300-B tubes before I retire and I'm on a fixed income ! ! !  
By the way, I had thought of purchasing a good tube-tester, so I can keep an eye on my power-tubes.  I may first ask my local audio group if anyone there has one...