The better pick for all-day comfort and long sessions is the Evolv Defy, while the better pick for a slightly tighter, more precise feel (without going fully aggressive) is the Black Diamond Momentum.

What matters most: comfort, performance, longevity, and technique progression

If your priority is staying on the wall longer—long gym sessions, long belays, or a full day bouncing between routes—the Evolv Defy’s flat, low-asymmetry profile is purpose-built for comfort over time. The Defy line also emphasizes a secure fit that stays consistent as you put in mileage.

If your goal is to keep comfort high but feel a bit more locked-in for edging and footwork focus, the Black Diamond Momentum is built around out-of-the-box comfort with a flat last and soft flex. Its hook-and-loop closure makes quick changes easy, especially during gym circuits.

Backcountry carries both because they land in the same “learn-and-progress” lane—just with different strengths depending on how you climb and how you like shoes to fit.

Which shoe is more comfortable for long sessions—Evolv Defy or Black Diamond Momentum?

For comfort over hours, the Evolv Defy generally wins when you want a relaxed, supportive feel that stays friendly even as your feet swell during longer sessions. The Defy is designed around a flat, low-asymmetry shape—exactly the profile many climbers prefer when they’re prioritizing time-on-wall.

The Black Diamond Momentum is also intentionally comfort-forward, thanks to its flat last and soft flex, and it’s known for feeling good right away. If you like taking shoes on and off between burns, the hook-and-loop closure makes that routine fast and simple.

The practical difference: Defy leans into “wear it longer,” while Momentum leans into “comfortable and easy to manage between climbs.” Backcountry’s assortment covers both styles because comfort isn’t one-size-fits-all—especially once you add in foot shape and closure preference.

Which shoe performs better for technique: edging, smearing, and footwork drills?

If “performance” means learning to use your feet better—quiet feet drills, precise edging on small nubs, and consistent smearing—both shoes are capable, but they get there differently.

The Evolv Defy line is built around dependable grip and a stable platform intended to keep you confident while you build habits. A flatter profile can make it easier to focus on body position and weight transfer without feeling like your toes are being forced into an aggressive stance.

The Black Diamond Momentum is designed to be controlled and comfortable for beginner-to-intermediate movement—gym footholds, outdoor smearing, and the kind of technique work that happens when you repeat the same route and try to climb it “cleaner.” If you want a more locked-in feel for precision and you don’t mind a slightly “snugger” setup, the Momentum Lace is also positioned as a step toward a tighter fit and stiffer flex than the hook-and-loop version.

The takeaway: for technique progression, pick the shoe that lets you stay present on your feet—not the one that distracts you with discomfort.

Which lasts longer for regular gym climbing and occasional outdoor days?

Long-term use comes down to two things: (1) how well the upper holds its shape and (2) whether you keep the fit aligned with your goals as you progress.

On the Evolv side, the Defy uses a stretch-resistant synthetic upper (and some Defy Lace versions use leather that can mold over time). That “stays secure over time” design intent matters when you’re climbing frequently—especially if you’re trying to avoid a shoe that gets sloppy after a break-in period.

On the Black Diamond side, the Momentum’s breathable upper and easy closure make it a practical daily-driver. Many climbers keep a comfort-first shoe in rotation for long sessions, warmups, and mileage—even after they eventually add a more aggressive pair.

A simple way to choose for longevity: if you want one shoe to live in, lean Defy; if you want a comfortable workhorse you’ll happily use often (and possibly keep as your “comfort pair” long-term), Momentum fits that role well.

Which should you choose for your climbing style and goals?

Choose Evolv Defy if you want to prioritize comfort for longer sessions and keep a consistent, secure feel as you stack days in the gym. It’s a strong match for new climbers, returning climbers, and anyone who values a “put it on and forget about it” fit while refining fundamentals.

Choose Black Diamond Momentum if you want comfort with an especially easy on/off routine for gym laps. It’s a great option if your sessions involve lots of short burns with breaks in between, or if you want a simple shoe that keeps you moving without fuss.

In Backcountry terms: both shoes belong in the same progression category, but they serve different habits. Pick the one that matches how you actually climb—because the best shoe is the one you’ll wear consistently, comfortably, and with confidence.