Yes, a home product with a dedicated controller unit, Fx networking support, cloud based management with ability to self-host, traffic shaping and SDN capabilities.
People can dedicate a small cabinet to UniFi rack-mountable gear plus the network center of their house. TP-Link has none of those, and not aiming for that market, even.
It's comparing a Peugeot 3008 with a Mercedes-Benz G Class and adding that, Mercedes has serious off-road trucks like Unimog, but G Class is their end-user product.
Apples to Pineapples.
BTW, it's not hard for me to install and manage a high capacity UniFi network in any way. I don't use their devices, because I don't want to manage yet another network.
A 3 pack WiFi 7 BE65 mesh from TPLink at launch costed 1500$. They seem to have done their usual hardware switching to now sell a similar BE63 for 500$. But if you are going to compare the two compare the actual hardware equivalent product. For 500$ You can get a controller and a couple of APs from UniFi, the setup will be far better than a 3pack BE63.
From what I see, Deco BE series have multiple models, with slightly different port configuration. Looks like BE65 comes with 4x 2.5gbE and BE65 comes with 2x5gbE + 1x2.5gbE. Moreover the site has multiple other Deco BE models. Both BE63 and BE65 is on sale and can be purchased.
From my experience, TP-Link makes hardware changes with "H/W versioning" in their model numbers. I have many RE220 extenders with different hardware revisions, earlier ones doesn't supporting OneMesh. However, I don't find later versions performing worse w.r.t. earlier ones.
However, $500/unit, the backbone of the devices doesn't look underpowered, esp. when looking to both wireless and wired specs. Considering my RE700X is saying what's written on the tin, and being rock-solid despite working with a non TP-link device and and being behind two 30cm walls.
I expect these Deco devices to live up to their specs.