At the end of the day, the connection and speeds for a particular house are pretty much the same for every provider who has to use the Openreach network - you’re paying for customer service and the router that they provide you with.
Plusnet come out significantly better than other providers, so if you can get their package for significantly less (and if setting up a new account with them involves about the same admin as transferring across the TalkTalk one), then I can recommend going with them.