FTTC 80/20 are far better than Virgin Media 152/12 because:
Network is uncongestion on BT Wholesale
Better upload speed on BT Wholesale
Cheaper
Very reliable service (no downtime)
I used to be with Virgin Media 152/12 and it rubbish because:
Network is congestion in my area
Poor upload
Expensive
Very unreliable service (too many tech visits and lots of downtimes)
Here is my wonderful FTTC speed since February live: