Originally Posted by
Vimana.
In some less urban areas, switching between say Sky and BT will barely change your quality of service as they basically use the same local infrastructure and 'backhaul'.
In modern exchanges & most sizable towns, cities and conurbations the Providers have their own infrastructure in the exchange, and some can provide a better service & better value than others.
Unfortunately, it's not always consistently the same Provider up and down the country. It depends on your location to quite some extent.
Where I am, I may as well stick with BT. I have a 50Mbs service from them, and consistently get speed in the very high 40's.
(Though, again, there is more to a decent Broadband service than solely the (local) access speed ).
Asking others opinion (ideally area specific) is the best way, as Kiffa is doing.