HomeBank offers prebuilt packages for many of the major Linux distributions meaning users do not have to wait for their distros repo to add or update the app and can just install or update when they like.
The layout and function of KMyMoney is very similar to Quicken, so for those that are familiar with Quicken and othe Windows applications will know exactly how to use KMyMoney.
By fully using the double entry accounting features in GnuCash, you can know (for example) not only that you spent $25 at Hugemart but that you spent $13 on groceries, $2 on disinfecting wipes, and $5 on motor oil. Later on, you can use data from that transaction and others to find out how much you're spending each month on food, home supplies, and car maintenance, along with other expense categories.
Setting the options for existing reports requires use of a multi-tab interface with poor usability. Creating new reports requires programming that will be beyond the abilities (or desire to spend time and effort) of many users.
Moneydance is a cross platform app so for those that use multiple operating systems it will be much easier to import and export information to each OS running the same financial application.
Upon import of financial info, all transactions will be set to the same default category meaning the user will have to go back and change the category by hand to the correct one.
Unlike most applications for Linux Moneydance does cost money, $49 to be exact. So while it is the most robust option available to Linux users, it will cost to be able to use it.
There is no hand holding or explenations with figuring out how to use Grisbi and unless you can read french there is no manual to help out with this either.