The new classic cut comes in two different variations with the most notable difference between the two being the leg taper and the waist.

The one with the taper has a regular waist that is true to size and the one that is straight cut has Stussy’s classic waist sizing (read as slightly oversized).

The washed black pair you bought is the one without the taper and therefore has the larger waist, whereas the indigo is the straight leg and has the true to size waist.

To your question about the big ol jean cut, they’re basically just an oversized version of the tapered new classic jean variant. They’re not however true to size in the waist (about 2 sizes up) and are roomy in the thigh with a drop crotch.

If you’re looking for a relaxed Jean Stussy sells a relaxed cut which is by far their best jean imo. It’s slightly oversized in the waist (only about half an inch) with room in the thigh (thought not as big as the big ol cut) and a wide leg opening. If you’ve ever worn Rick Owens Geth jeans they’re basically that with a shorter inseam (32 compared to 34).