These sit in different price classes - KEF LS50 Wireless II costs roughly 3.3x what Kanto TUK does. Expect it to lead on paper; the question is whether the gap is audible enough in your room to be worth it.
| Area | Better | Why |
|---|
| Bass | A | KEF LS50 Wireless II digs deeper - 45Hz against 50Hz. A subwoofer would even that out. |
| Built-in power | A | KEF LS50 Wireless II has the bigger amplifier (380W vs 130W RMS). |
| Connections | A | KEF LS50 Wireless II adds Wi-Fi, streaming and HDMI; Kanto TUK adds phono. |
| Size | depends | Kanto TUK is easier to place; KEF LS50 Wireless II is bigger, which usually goes with fuller bass. Your room decides. |
| Expandability | depends | KEF LS50 Wireless II: a sub output; Kanto TUK: a sub output. |
| Price | B | Kanto TUK is cheaper - $900 against $2,999, about 70% less; arguably a different class. |
A KEF LS50 Wireless II B Kanto TUK
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both speakers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
The usual trade-off: KEF LS50 Wireless II measures better, Kanto TUK costs about about 3.3x the price% less. Whether that gap is worth the money is the call only you can make - and in a normal room it is often smaller than the numbers suggest. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 50Hz anyway, which makes the cheaper Kanto TUK much easier to justify. Think about the whole system, not just the speakers: the roughly $2,099 saved by taking the cheaper pair would buy a subwoofer or a better amplifier, and either usually does more for the sound than the difference between these two.
And remember what a spec sheet cannot show: how each looks in your room and whether the finish suits it, what dealer support and warranty are like where you live, and how they actually sound to you. If you can hear them first - ideally with your own music - that will tell you more than any number above.