Hey, Methow Packer, great question you posted here.
Circa 1961 - When I began reloading it was to save money on hunting and plinking ammo. I used the press exclusively. It was essentially a one step process. Install the FL resizing/decapping die (complete with neck resizer), run the brass up to resize and decap; hold it in place and insert a primer, pull it down to seat the primer and remove the case. There - it's all done. Using a hand primer seating tool in those days didn't make much sense.
Fast Forward 1965 and beyond -
Since I got interested in competition shooting I've gotten somewhat more finicky about how my loads work. Now it's body dies, neck sizing mandrels, primer pocket cleaner/reamer, hand priming tools, etc.
Point is, it's going to depend on what you want in terms of net result. Either method will work just fine. gun)