depends .
if you went at the same speed .
difference would be download quota (usage)
different unmetered sites .
unmetered servers (games)
the service will be no different just price .
you might get slightly different speeds but i can't judge that .
i haven't had the experience of the DSLAMs at your exchange .
it's mainly all about the ISP's equipment .
not them .
if your line drops out that's the equipments fault .
and that can only be lead to the manufacture or the maintenance dudes .