Well, not quite the same thing... the TP-Link product is 2.4GHz only, which is kind of a big deal these days. Support in DD-WRT and Tomato for 5GHz and 802.11ac protocols is somewhat shaky today (on some devices at least), but hopefully will improve.

Why is 5GHz a "big deal" rather than a "nice to have" (but no big deal if you don't)?

2.4GHz has three non-overlapping channels. At max bandwidth, it has one non-overlapping channel.

5GHz has twenty-one non-overlapping channels.

In an apartment building, where you're pretty much guaranteed to be in close proximity of at least a few other active routers, 5GHz is a big deal.

Heck, I live in a detached home and have 14 visible networks from my living room.

Ah, that makes sense. Thanks.

Any details there? wrt or does it work out of the box?

You can quickly flash the device with an OpenWRT build. Pushing an update to our site shortly that has some of the details. Look for the Developers tab soon.