To answer your question. An S10 and a 2wd Blazer are not the same.
Older S10 are the same as a G body, so no upgrade there. A Blazer offers dual piston, a slightly bigger rotor and an integral bearing.
Not sure what you are saying about hard line but I'll rephrase it.
I tried the flex lines off of both the G body and the Blazer. Also tried both brackets. So that is 4 combinations of parts. Many will say it works and I'm not here to contest that. Especially with the front suspension at full droop, it's pretty much works 98% of the time. The hose did not look comfortable to me at full lock. Realistically, few cars will see full lock at full droop.
At full compression A N D full droop there is absolutely nothing that works for all positions. Again, it can be said, nobody will ever be in that situation.
To satisfy all positions, I had to do what I described in my brakes thread.