I haven't heard the Tylers, although I have seen a few references to them. They always looked to me like a relatively cheap entry into what is conventionally expected in a mastering facility - bling in the form of monster speakers, statement amplifiers, garden hose speaker wire, etc., to impress the client. I have never read a credible review of any Tyler yet.
As I said - from the sound samples on that page, I would say that either the speakers have a lot of overhang in the bass region or the room acoustics have an R60 characteristic which insufficiently damps this bass range, because all the samples are bass-deficient in a similar way. Do you not agree - or do the samples sound good to you?
Actually they are very good speakers. Nothing cheap about them. The drivers are basically the same motor design and type as the Seas Excel line of drivers but with a paper cone. Copper coated aluminum phase plug, vented coil, Copper shorting rings, Copper coated top and bottom plate, etc. All first class....

And I should know. I designed the drivers.

And the speakers.
No overhang in the bass region at all. Very clean!
And there are tons of great reviews out there on the Decade line that I designed for Tyler Acoustics. All are great reviews.
I really can't judge the mix quality played back on my modest desk top speakers. I am sure they are only MP3 or some other compressed file type for Youtube as well. Maybe the guy that made the mix had the servo subs cranked way up and he is compensating for it. Maybe he wanted them that way. I do not know.
At least he has speakers capable of allowing him to hear everything accurately, or at least to the level that his electronics allow.
And it is hard to tell if the speakers are backed up to an untreated wall (way to close) or if it is an acoustically transparent false wall. In one pic it looks like it could be a false wall. It could be just fabric coated. I certainly wouldn't have opted for a hardwood floor though.