What's the difference between .sqf and .sqs files?
If say shortly sqf and sqs have a bit different syntax and some sqs command won't execute in real time debug console.
SQF does not have a goto command anymore.
SQF commands can span several lines if they are enclosed in brackets.
SQF can return a variable, where SQS cannot.
Comment in SQS looks like this: ; bla bla bla,
Comment in SQF: // This is single-line comment
/* This is multiline
comment
*/