Mesh is a marketing term for non technical people. It is really just another name for wifi repeater. The only difference is now they use proprietary methods of solving wifi requirement only a single device can use a single encrypted connection rather than WDS used by the old repeaters. This is mostly so they can lock you into only buying equipment from them.
Mesh still suffers the same issue the old repeater. Unless there are extra radio chips in the units purely for traffic between the units they share the bandwidth. This means the traffic is being sent twice which cuts the bandwidth in half....or even more if it goes multiple hops. There is no free lunch here. You either pay for extra dedicated backhaul radio chips or you exchange bandwidth for coverage distance.
The coverage numbers are very suspect on any of these. Just because it is wifi7 doesn't mean it goes farther, very technically when you use 320mhz radio bands you must transmit at slightly lower power due to regulations so it actually will go less. They are looking at the distance if you have multiple repeater hops in the path.
Without digging though all the details on which model do what I am not sure about the speeds. It appears they are assuming you can use the wifi7 feature that lets you bond 2.4,5, and 6 radio together. Maybe the router can do it but no end device exists that I know of. If these nic cards exist they are going to be very expensive. Rather than just a single radio that you can pick the band you now must have 3 chips one of each band since they run at the same time. No mobile platform like a cell phone will ever support it. The extra radio chips take more space and use more power. This feature is another one for the marketing guys to put big numbers on the box that nobody can actually get.
And then you have the so called seamless roaming. First and most important the end device not the network decides where it connects and when it changes. Next you will always get a very small interuption because the wifi session keys must be renogotiated when you change from one base to another. This is not a mesh feature it has been in use in busniess since the start of wifi. It "mostly" works but some end devices are really stupid. The concept of true seamless roaming is actually stupid. I can see the idiot falling down the stairs in his house because he is watching netflix on this phone......the idiots already walk out in front of cars.
As you can tell I really don't like "mesh" of any kind.
If you want better wifi coverage run ethernet cable between the main router and the remote rooms and place a second router in that room running at AP. This is the solution large business still uses, none use silly mesh systems.