Digital Spy is usually less accurate than BBO for some reason. For example, they only had 80% or so for Nicole to be evicted.
On DS, as soon as the poll comes up - users vote straight the way, whereas in realtiy the majority of votes are cast on eviction night... But since the phone lines are only open for 2 days - DS should be more accurate.
But it looks like Lisa is going since it's a vote to evict - If it was a vote to save however, I'm sure Sara would have been evicted.