Swivel screen is ok, but to me not that much of a deal breaker. Both my camera bodies, T4i and 70D have it and I find myself not really using it much, other than it's nice that the screen is not exposed while storing.
That should be the real basis for aiding in making a decision.
They say it is not the same sensor as the 70D, however I haven't found anything other than that statement, to prove that it is not.
3fps faster burst isn't enough to justify replacing my 70D. I may eventually pick one up, but I doubt I'll be pre-ordering one.
Its not the same sensor the 70d has the digic 5, its good in low light, however the new 7d Mark ii will have the dual digic 6 processor. I have the 6d and love the low light, but 4.5 fps is kinda slow for the sports I shoot, so I am going to pick up the 7d Mark ii for the extra reach and 10 fps speed for action. I will still do my portraits with the 6d.