I would certainly recommend you take some time to explore the differences in detail. Many of the US based cloud accounting applications don’t cater very well for UK/EU tax legislation. Many don’t even support basic VAT reporting.
I can’t really comment on the minute differences between varying accounting applications. Although we work on the basis of user feedback and prioritise those features that are requested the most frequently on this forum.
For now I will switch this thread to a feature request and we will track the interest in this going forward. If in the mean time you decide QuickFile is not going to do the job for you of course we would be disappointed but you are able delete your account by following the procedure here.