Are the runner screws the same for the Speedblade as the E-Pro as the Prolite?

[mtn 20]

Question is in the title. I like having backup hardware for my stuff, in case something goes wrong. I have SpeedBlade +4.0 holders/runners, and I believe I have a few old pairs of Tacks from my youth in my parents basement that would have Pro-Lite holders. Have the screws changed at all? Could I salvage those from the Pro-Lites to potentially use on my SpeedBlades?

[JR Boucicaut 3793]

PL3 screws are compatible with E-Pro and SB 4.0 holders.

The screws have changed, in the sense that they now have a flat spot to sit on the holder better.  But they still hold the steel well.