U6-Pro is now on FCC.
The U6-Pro is a Wi-Fi 6 access point designed for wide-ranging wireless coverage while maintaining overall network capacity. It delivers an aggregate radio rate of up to 2.7 Gbps with 5 GHz (4×4 MU-MIMO and OFDMA) and 2.4 GHz (2×2 MIMO) radios. U6-Pro uses a sophisticated antenna design with sideways amplification to offer excellent range when mounted horizontally. U6-Pro combines its purpose-built antenna with powerful Wi-Fi 6 features like OFDMA, beamforming, and BSS coloring for reliable long-range wireless performance
https://fccid.io/SWX-U6PRO/Test-Report/Test-Report-4864581
So it looks, I have guessed the name correctly but spec-wise I was wrong. I thought Pro version would have Wi-Fi 6 2.4 GHz, perhaps 4×4 MIIMO radio. If it were the case, aggregate throughput would have been 2.4 Gbps from 5 GHz + 1.2 Gbps from 2.4 GHz = 3.6 Gbps.
Currently, UniFi AP HD and AP Pro have secondary Ethenert port, which is lacking based on the picture.
The last piece is if Pro has 2.5 Gbps i.e. 2.5GBASE-T ethernet port capability. However, this seems unlikely.