Polls are more advanced. Different demographic. No Sheffield Rally, no 'double tax whammy', no sitting Tory government with a massive majority like there was pre 1992 election etc
I could be wrong but I don't think it would happen if Tories won the most seats cos they'd carry on the coalition with the LDs. If Labour get the most seats they could probably form a coalition with the LDs so it would not be necessary to involve the SNP in a formal coalition.
I think Cameron has been lack lustre and presumptuous. Milliband has done reasonably well. The Tories have patted themselves on the back for a recovery that would have happened anyway due to low oil prices and them carrying on printing money. Most of the benefits have gone to the wealthy. Let's...
I think Green is the only sensible long term option for any of us. The problem is, people say they are Green, but in practice they find them unpalatable.