Difficulty Level
Yes, XAT is difficult than CAT. If it is difficult for you then it is difficult for others too. Because of this perception number of people applying for XAT is much less than CAT so the chance of excelling increases.
CAT is just QA, LR and VA whereas XAT has decision making, GK and essay writing additionally.
There are negative marking for unattempted questions in XAT
There is no sectional time limits - you have to manage your time depending on your strengths and weaknesses
For CAT, a correct answer gives you 3 marks whereas for XAT it is plus 1
The questions in XAT aren’t that difficult. It is just more time consuming than CAT. If you prepare well, give regular mocks, then you will be able to score well.