Quoted from pezpunk:Williams have more mechanisms and gadgets, and more elaborate playfields and theme integration. (Modern) Sterns have deeper rules. People can argue about things like flow and build quality but physical complexity vs software complexity are the starkest differences.
Yep. All I'd add to this is the software complexity usually appeals to more serious players. More casual players typically appreciate simplicity. I also find the B/W titles to have more humor and better theme integration. STTNG in particular, has awesome theme integration. STLE not so great. I've owned both, and STTNG is still in my collection. I just think it's a better overall package...I wasn't a fan of the STLE rules.