dont know about other people but for starters i find information writen on paper much easier to assimilate quickly than on a computer screen
although timing is key in BMAT i found the UKCAT far more stressful timewise
content wise they are not that different apart from the essay cos you'll prob be doing chem and bio so the level of science isnt hard.
essay spacewise is hard (you only have one page) but its only really 4 paragraphs
spelling out what the statement states and outlining a few key points
arguments for
areguments against
conclusion