A Comparison of Common ESPHome-Compatible MMWave Prescence Sensors

Models
DFRobot C4001 (SEN0609 Variant)
Not personally evaluated, but seems to be a strong contender, especially for larger spaces
Amazon: Unavailable ("Gravity" SKU SEN0610 listed, but lacks the 8 antenna panels, using 2 instead. Limited feature set and some poor reviews)
DFRobot: https://www.dfrobot.com/product-2793.html
Digikey: https://www.digikey.com/en/products/detail/dfrobot/SEN0609/23028638?s=N4IgTCBcDaIMoFEByAGAbCgnCAugXyA
Mouser: https://www.mouser.com/ProductDetail/DFRobot/SEN0609?qs=HFfMDpzxxd21aKNJkzimmg%3D%3D
Cost: $14
Features:
Prescence Detection up to 16m (52ft)
Motion Detection up to 25m (82ft)
Horizontal Detection Angle of 100°
Vertical Detection Angle of 40°
LD2450
AKA: HLK-LD2450
Amazon: https://www.amazon.com/gp/product/B0CGNM1VLM/
Cost ($): $9 ea. @ $45 for 5
Features
Prescence Detection up to 6m (19ft)
Azimuth (L/R): ±60° (120?)
Pitch (Up/Dn): ±35° (70?)
Track up to 3 targets*
Define up to 3 zones*
2 sensors might cover the same area and more effectively than an LD1125H, for less cost
* May be an ESPHome implementation-specific limitation that can be overcome by tweaking the lambdas
LD1125H
AKA: HLK-LD1125H-24G
Amazon: https://www.amazon.com/EC-Buying-HLK-LD1125H-24G-Millimeter-Respiratory/dp/B0C743T4H9/
Cost ($$$): ~$25 ea. (Might be able to be sourced cheaper via AliExpress, etc)
Features
Moving Body Detection up to 8m (26ft)
Stationary Body Detection up to 4m (13ft)
Ceiling Mounted Body Detection 2m (6.5ft) radius @ 3m (10ft) height
Limitations
Not cost-effective when an LD2450's range will do
No target tracking or zones
Movement filtering, such as for a fan, must be done by a radius range with an implementation-specific lambdaSEN0610