It's not exactly clear from your question but I will assume that you want to know about the difference in difficulty level of studies in Europe.
I will say that studying in India is probably more difficult than doing so in Europe. This is because the education-job model is totally different over here.
In India, you need to get good marks all the time to get into a 'good college' so as to have a 'good job'.
In Europe, education system is strong and abundant. Its cheaper for the parents (who, in the first place, get allowance from the government for having children!). There are many universities all across the Europe with enviable credentials. Many of the universities are centuries old. So there is no dearth of good colleges.
Along with the education system, the 'job system' is also very solid. If you don't get a job, you get an unemployment pension from the government which is reasonable enough.
Therefore this difference in the education and job system makes the cut-throat competition in getting into a good college - which happens in India - somewhat trivial in Europe. Here the students study mostly for learning and knowledge. To get into a good college, of course they need to get better than average grades - but they also need a strong interest and intent. People like to mix different courses together and study what they have interest in.
Also, in India, most of the parents want their children to be doctors, engineers, MBAs etc. - as if other education streams and the associated careers aren't respectable and high paying enough. In Europe, I have met people studying many interesting courses without thinking much about the 'job-scene'. For e.g. I met a German girl who studied Political Science in Berlin. Then she took up Economics major as she wanted to work for United Nations. Along with that, she wanted to learn and be fluent in French - so she is currently studying in Lyon, France for an year as exchange student. All out of interest!
Not digressing too much, the above factors generally make studies, and hence the education system in Europe, to be probably less-intense than in India. People really enjoy what they study and hence pressure is comparatively less.
However, if you are into Post Graduation and research field, studies can be as difficult as in any other part of the world. The developed countries spend millions on their universities and therefore the R & D facilities are world class.
So I will finally put it as that the difficulty level in education in India is probably more due to the difference in education and job system, attitude of the students and their parents towards studies etc.
Related to curriculum - I can't really compare the difficulty level - for which I will take an example. Suppose you are taught a concept in mathematics in India in Class 12th, and the same thing is taught in Europe in graduation. So, if you are an Indian student who has come to do graduation in Europe - you can't say that the level of education is low as you have already studied this concept in Indian school. Reason - Probably you were overburdened in Indian schools and that concept need not be taught at school level. Therefore it is very difficult to comment on this subjective question.
I hope you got some idea about education in Europe. Do write if you have some specific question or comment.