Hey, just my two cents—between the two, the Zoot Pro is a solid starter, and a lot of people have had good experiences with it. Yeah, there have been some concerns about the frame near the seatpost cracking under heavy use, especially if you're doing bigger street moves, but for learning and lighter riding, it should be fine. That said, if you're planning to push into heavier street trials, the Echo Mark 5 is definitely stronger and more durable. Geometry-wise, it’s a bit more comp-oriented, but with some adjustments, you could make it work for street. Still, if you can find an Inspired Fourplay, that’d be the ultimate pick for this kind of riding.