Here is my experience over the years:
Fireline: a “stiff” line, flat too. Repels water, but frays really bad and doesn’t hold its color (fades).
Good trolling line for open water and weeds. 10lb or less can be very “brittle”, knots breaking way too easy.
Powerpro: Soft line, but it has a tendency to “bite” into the spool on the smaller sizes. If the spool isn’t wound “excessively” tight, problems occur with both backlash and the line biting into the spool of all sizes. Also, some colors fade excessively. Good trolling line and holds up better around rocks than fireline.
Spiderwire Stealth: I put this in the middle of Fireline and Powerpro. Very forgiving on spooling and holds up to abrasion as well as Power pro. But spools better than power pro. Much stiffer than power pro, which makes pitching/casting a little “difficult”. Stiff like Fireline. Doesn’t absorb water as bad as powerpro, but more than Fireline.
Original Spiderwire. Still my all time favorite. Softer than fireline and more abrasion resistent. Spools better than Powerpro and more forgiving. Almost “too soft” and limp, where casting can catch the line around a guide on the rod and snap off your lure. Not good because of that.
Trolling: It is good to have abrasion resistent lines when needed. It is also good to have a “stiffer” line when needed. (fireline, stealth)
Casting/pitching: Good to have a limper line that is more abrasive resistent (powerpro, Original Spiderwire).
I haven’t had the opprotunity yet to use Suffix or Stren, but I haven’t heard anything negative about them yet!