How do I choose which module to use when there are several options for the same functionality?
Personally I do a few basic checks before digging deeper.


How many reported installs? (about the same in your example modules).
How long since last update to module? (Spamicide is 5 days ago (from today))
How many open issues?
Who is the developer? (Have they worked on other modules that I use, etc).


Then you can start digging into integration, if I where looking for an inline image management tool I personally would choose something that takes advantage of other modules instead of rolling it's own solutions, something that is features exportable, etc.