So I've sat with the strings for a bit and done some more comparisons. They are definitely on the more flexible side, with smoother outer wrap. Similar to DR Hi Beams if i remember correctly. I still like these most out of the SIT lineup. They seem to have the best clarity without sacrificing depth.
Here's a few comparisons of eq balance. I did a match of a few I thought might be familiar so you can see the difference in overall balance of tone.
Dunlop Super Brights SS. You can see the Foundations have a scoop in the 500 to 1k area, with a bump in the sub low and more detail in the hi mid and extended highs

SIT Rock Brights SS - Much less in the sub low and more upper - extended mids
DR Lo Riders - More sub and extended highs / a bit of a scoop from 500-1k
I really found these to have a unique tone and couldn't get any other strings to sound super close to the tone except the Rock Brights. They are clear and full sounding without being boomy. If you were hoping for more clarity and edge from DR strings like I was, that seems to be about where these land.
Here's a few comparisons of eq balance. I did a match of a few I thought might be familiar so you can see the difference in overall balance of tone.
Dunlop Super Brights SS. You can see the Foundations have a scoop in the 500 to 1k area, with a bump in the sub low and more detail in the hi mid and extended highs

SIT Rock Brights SS - Much less in the sub low and more upper - extended mids
DR Lo Riders - More sub and extended highs / a bit of a scoop from 500-1k
I really found these to have a unique tone and couldn't get any other strings to sound super close to the tone except the Rock Brights. They are clear and full sounding without being boomy. If you were hoping for more clarity and edge from DR strings like I was, that seems to be about where these land.

