its easier in that you are more prepared of what to expect, night feeds, nappies etc. but i found it harder in that with ds1 he fitted in around our lives, came with us to restaurants, took him to friends houses that didn't have children, but ds2 was a 'noisier child' he neversettled weel, whereas ds1 would happily play in his pram/buggy/on the floor with a small collection of toys.
ds2 constantly needed to be held and have attention or he would cry th whole time (basically he was a bit of a nightmare, thankk goodness he has grown out of it). ds1 slept all through the night from 9 days old and he was breastfed but with ds2 it was over 2 years before i had a proper nights sleep!
i think it just depends on the personality of the child if they have a similar disposition or better/more placid/nicer than the first then its a piece of cake, but if you first has lulled you into a false sense of security about how easy it is, just be prepared that it may not be.
having said all that, i do now love having my 2 boys and can't imagine not having either one of them.