There's no way around it, you're going to need to demo those two to be able to decide. I love rows, but finding a seated supported row that feels just right can be hard to do. Especially if it is a fixed arc lever, getting the seat in exactly the right spot so your natural movement matches the machine is essential so I'd lean towards the one with the greater seat adjustability if you can't demo - especially if you are buying it for a wide range of clients.