It's interesting though that the guarantee is so much lower than for BTW. Is number of users per PON known for Cityfibre? Or is it because many more Cityfibre customers will likely take the 1G service as the incremental cost is so low?
BTW (that's BT Wholesale) don't necessarily guarantee 195, 450 or 700 (or any figure the provider quotes you).
BT guarantee 450 or 700Mb/s depending on your exchange. They do that off their own backs. They have absolutely no way to enforce it. If your speed falls below their guarantee all they can do is ask their supplier (BTW and Openreach) to look in to it and failing that they pay you compensation or let you leave your contract.
Openreach guarantee providers 110Mb/s downstream on the 160, 330, 550 and 1000/115 products.
So when BT guarantee 700Mb/s to a customer they themselves are guaranteed 110Mb/s from Openreach.
Only the 2 higher upload business tiers from Openreach (500/165 and 1000/220) have a higher guarantee of 220Mb/s.
AAISP are likely giving a higher guarantee on Openreach vs Cityfibre because they trust they can meet it.
They have next to zero experience of Cityfibre. You may find their CF guarantee increases over time.
Number of users per PON is the same on both networks.