The second time is definately easier with the pushing in theory because the first baby has 'paved the way' so to speak, but this isn't always the case - many things like your's and baby's positoin can affect the way it moves down the birth canal.

Even if you don't have the strength anymore to stay upright for the last moments, even laying on your side helps, as this take your bodyweight off the tailbone, allowing it to push outwards to accommodate the baby coming through - almost like a little gate in a way.