Changing from bt infinity, could my speed increase?

[#1]

Hey everyone so I'm debating about leaving bt infinity 2 because plusnets price is so much better but I'm also hoping I get some upload increase. I'm estimated to get up to 20 mb upload with bt but I'm lucky if i hit 6, as I do YouTube videos the upload is more important, also I mite start streaming games so having good ping and bandwidth would be nice. . Is there a chance of getting higher upload speeds or does it sound like I'm at the max my line can handle? Also is the plus net router better than bt's? Can u use plusnets router alone or do you all need the extra bt modem router? 

[#2]

Firstly what does it say here https://www.dslchecker.bt.com/ ?

Thing is if your line will not support the 20 up PN will not sell you that product , you would have to take the unlimited fiber 40/2 , Rather than the fibre extra 80/20

[#3]

I changed to PN last week, I was on BT Infinity 2, and I have seen a 5 meg increase in speed.  Mind you it is still settling down, but so far am hopeful.

Carl.

[#4]

Says i should  get a min of 7.3, currently im getting 50 mb download which is fine but 6 mb upload which sucks! think im gona take a risk and change to plusnet!