The sequel keeps the core 8x8 grid and cluster pays but adds some cool upgrades like the Giga Jar feature, gold vinyl collects for level ups, and instant prize symbols in the base game. It's still high volatility with big potential, but the free spins and multipliers feel more exciting. I found a solid overview with gameplay details on jammin' jars 2 that explains the changes well without spoilers. Definitely give it a spin if you liked the first one!