(Image credit: Future) I tested the Amazfit Active 3 Premium earlier this year and loved it. It's definitely one of the best affordable fitness trackers you can buy. But it got me thinking: how does this $169 fitness tracker hold up against the Apple Watch SE 3 at $249-$329? Investing in one of the best fitness trackers is an important part of your fitness journey, and you don't want to waste that money on a smart watch that can't keep up. There are three essentials when it comes to fitness trackers: ease of use (including durability and battery), fitness features and sleep tracking. Article continues below The Amazfit Active 3 Premium is a budget fitness tracker with 12 days of battery, a 1.32-inch screen and access to the Zepp app. The Apple Watch SE 3 is Apple's budget fitness tracker, with seamless Apple ecosystem integration, two size offerings and an 18-hour battery life.…