Never tried the Penn line. The stuff I have seen reminds me of the ‘cheap bulk line’ which is quite often seen under a range of different brands. But most brands have a range of different product lines.
On my trout reel I have used. Stern extra tought 6lb. It
was a fairly good line. Caught a salmon on it.
So next I think I did 10lb fireline. But I did not use a leader and had terrible knot strength. Hated it.
Then I replaced it with 5lb Ultra green (Maxima?). But I kept on breaking the line and knots.
After a while tried fireline again. This time 8lb with leader and I started to like it. It really does need a leader to get the most out of it. The knot strength of fireline by itself is terrible.