Actually I think the umpires are different, I tend to use David Boon a lot because he does give you the odd DRS challenge, certainly more than some others who never seem to be wrong. Last night I had a definate edge, when I appealed it was not out, challenged the decision and despite visually being able to see an edge, and hear it for that matter, the was no hotspot replay shown in the sequence and the decision remained the same, frustrating but I imagine it was an instance of graphics and physics not matching.