As others have said, huge difference between the two roles. TSS is going to either be chill as hell or very demanding depending on the shift and DC campus you work at. Overnights at a small DC you will be on your phone most of the time.
If you work at a dual campus DC and get a shift during peak delivery hours you will seldom get a chance to sit down.
You will also be expected to do very dangerous acts.
Somebody died doing the role because they were crushed when walking between two semis. Target pretended like they increased safett but did zero real changes.
STSS understand you are going to be looking for TMs stealing. You will be expected to succesfully close at minimun two internal theft cases by yourself each year.
I enjoyed the job but it is very high pressure and comes with some serious risk. My last day I had to deal with a someone bringing a gun into the building. That ended up being the reason it was my last day.