There are three series in Samsung's 2019 4K QLED TV lineup: Q90R, Q70R, and Q60R.
The Q90R is the flagship of the three, and comes in 82, 75, and 65-inch screen sizes. This is a full-array local dimming model with the same number of LED zones as most of its 8K brethren. It has built-in Bixby, and supports the One Invisible Connection and no-gap wall mount.
The Q70R is also a FALD model, but it has local dimming fewer zones than the Q90R. It has built-in Bixby, and is available in 82, 75, 65, 55, and 49-inch screen sizes.
The Q60R is an edge LED dimming model, and comes in 82, 75, 65, 55, 49, and 43-inch screen sizes. It doesn't seem to support Bixby on the TV and One Invisible Connection.