When I was in Hove and could not have Virgin Media due to the conservation area, every comparison site had all suppliers other than BT providing a slower service.
When I then checked on BT's site, they were offer one bundle at a certain speed and then bundles that were less, but these lesser...
Then factor in, if you go with option 2, but not BT, they only sell their competitors the slower lines, so you are never getting the best broadband speed.
As to the 'fibre optic' broadband, questionable advertising.