I found it harder.
I think it was because it is more pressure in a real exam for one, I had flagged a few questions at the start I was not so sure of and when I returned (after nervs settled a bit) I managed to correct them in time once I was in the swing of it.
On my practice tests I have done I never had a time problem but I was running short tonight, lucky you are able to cycle over all the questions flagged or not as much as you like in the time.
Tip for anyone about to sit this would be to flag everything you answered and was not 100% about, and ones you are very unsure of as you can view them again and alter your answers at will (they do not save till the very end of the time) So, this will mean at the end you will have viewed every question and highlighted any problem ones which you can divide your remaining time on these, and if very very short on time, the answer is A...