U have got good marks in the paper u have attempted...these are good to fetch u good rank in BITSAT.
But still u cannnot say anything abt difficulty....it can be either difficult/easy..so all u can do is just be thorough wid u r preparation..
And it is absolutely rubbish that tests on one day can be difficult than on other days..
Its ur luck that what questions u will get( questions are randomly chosen from a big question bag..)
All da best!!