Well from the Everlast video that shows the case size for the 140ST it looks like they have to be different cases, as the 140 case is only about 5.5" thick. From what I can see the 140 looks about 12" front to back, maybe 10" or so tall and about 5" wide or less. So the 160 is a little bigger.

Mike, do you have a 160STH case you can measure?

Looks like for the smallest package I'll also go with a 140. I will probably do a few mods anyway.