Different turning behavior after changing tires
You should read up on bicycle handling dynamic to understand how various elements influence how your bike behaves during cornering. You did not provide the actual sizes of each tyre, nor the pressure you use in them. My guesses to explain why your cornering has changed so much would be:


Your new tyres have a significantly bigger outer radius, hence affecting the trail of you bike.
Your new tyres run at lower pressure and are therefor flexing more when leaning in corners.
Your threaded tyre offer increased grip on the edges, while your slick have a reasonably constant grip regardless of leaning angle.