Gauge
If the gauge is the same as tennis strings (15-17), you should be fine.
I bought a ton of ektelon synth gut a long time ago in 16g and came to find out that it was the exact same as Prince synth gut since Prince bought Ektelon. I had used PSG for a long time and noticed the ektelon felt the same as well.
One thing to be careful is that the length of string may be shorter.