Eco lifestyle. It offers one of the most complex systems they added yet (eco footprint) and the gameplay is as deep as it gets, with many new goals that your sims can achieve: making a neighboorhood green, running your own candlemaking or fizzy juice business, eco upgrading your whole house and lower your bills, creating all of the furniture in your hose, organizing the local community etc. You need to put a lot of effort to accomplish these goals, you follow your sim in every step and you see the immediate result of you sim's efforts. For me eco lifestyle is the work pack we didnt got with get to work.
Snowy escape is a good pack that follows on the steps of island living, offering a new world to explore and it has many new snow activities. I have no complains about it. I just thing eco lifestyle is better.