A Weber Smokey Mountain is a better dedicated smoker. Bigger capacity, more stable temperatures with less attention, easier to manage 12+ hour cooks. The water pan is built in, the temperature gauges are positioned correctly, and the bullet shape generates better convection than a kettle ever will. If you're smoking weekly and outgrowing the kettle, the WSM is the natural next step. See our Weber Smokey Mountain parts and overview guide for the breakdown by size.
A pellet grill is more convenient. Set the temperature, walk away, come back in 8 hours. The trade-off is flavor profile (pellet smoke is milder than charcoal smoke) and price (decent pellet grills start at $400, good ones at $700+). The best pellet grill roundup covers the current options at every price tier.
But a kettle smokes excellent food, you probably already own one, and the snake method costs $0 in extra equipment. The flavor a Weber kettle can produce — especially with hardwood chunks and proper vent management — is genuinely competitive with food off a $400+ dedicated smoker. The only thing the kettle truly gives up is convenience: longer setup, more attention during the cook, less unattended-cook capacity.
Recommendation: master the kettle first. Run 5 to 10 successful snake-method cooks before spending a dollar on new hardware. If you find yourself smoking weekly, hitting capacity limits, or wishing for hands-off overnight cooks, then upgrade — to a WSM if you want the same charcoal flavor with more capacity, to a pellet grill if you want the convenience, or to a Weber Summit Charcoal if you want a premium charcoal grill that does both grilling and smoking exceptionally well.