These sit in different price classes - Kanto REN costs roughly 3.5x what Edifier MR4 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 | B | Kanto REN digs deeper - 50Hz against 60Hz. |
| Built-in power | B | Kanto REN has the bigger amplifier (100W vs 42W RMS). |
| Connections | B | Kanto REN adds Bluetooth, HDMI and digital inputs. |
| Size | depends | Similar cabinet size - neither is easier to fit. |
| Expandability | B | Kanto REN: a sub output. |
| Price | A | Edifier MR4 is cheaper - $170 against $599, about 72% less; arguably a different class. |
A Edifier MR4 B Kanto REN
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: Kanto REN measures better, Edifier MR4 costs about about 3.5x 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 60Hz anyway, which makes the cheaper Edifier MR4 much easier to justify. Think about the whole system, not just the speakers: the roughly $429 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.