Want to image disks. .MSA or .ST ?

Going through boxes of ST stuff, sourced from many places.

Found several "Compute's Atari ST Magazine and Disk" disks.   Would like to make images.  I have some issues of the magazine, and will one day like to scan them (and get more, perhaps) because ST magazines/disks are NOT compiled nicely like they are for the 8-bit, with the exception of the EXCELLENT STart collection.


I have FloIMG, which I think is pretty cool.  I've only used it a little.  It looks like it makes .MSA images.  Well, why are there .ST images out there, then?

What is the difference?  Why are there both formats?  Which is newer/superior?

Since FloIMG makes .MSA, I'm probably going to use it, but I thought it prudent to ask, first.

I hate .STX by the way.  Who wants a format that can only be used on an emulator?   I mean, I understand the copy protection is intact, but why can't you write it to disk, copy protection and all?

Thanks!


edit:  just noticed that FloImg does both ST and MSA but question still stands!   THx!