I have had the pleasure to have heard both speakers.
I would most definitely not describe the Tekton DI as warm.
But I would not describe them as bright or lean either.
I agree with others that they are very neutral.
I agree that they are revealing, transparent and fast/quick. Very much like a panel and a horn but not with their negatives and with all the positives of those designs plus all the positives of a great driver design.
Best of both worlds.
I also agree that the DI are a window of what you use with them.
When I heard them at Capital Audio Fest I could tell that they were being held back by the equipment being used with them, not that equipment are not good.
But with better equipment the DI would have soared much higher than they did.
In my experience there are few audio products that “windows” to whatever is attached to them. That can show what the weak links in a system are. And will allow what is best to shine through.
IMHO and experience the DI (and I expect the latest Tektons) are one of these rare ones.
While I would not describe the Legacy as “warm” per se, I would say that it falls on the warm side of neutral.
If I had the money to spend I would consider going to the DI SE.
Just my opinion.
Al Mirabella
Ambassador for Taiko Audio and Sound Galleries
Sound Test USA
PS I have no skin in this.