Well it doesn't mean that an interview gurantee you an offer
right? I would suggest you just go for the interview, then if an
offer comes, you weigh the pros and cons of both. After all, even
though you start first at the current company, you are under
probation right? Probation period easier to get out, cook up an
excuse say the job is not right for you, blah blah, then you jump
over loh. It works, I've tried it before 
But then,
of course, dont even think of going back to the old company if you
find that the new one isnt as good as you think. haha 
