I own oculus, zeiss, leupold, vortex and some oddballs. Zeiss has the best clarity and light gathering. Barely better than the vortex razor. Leupold, unless something changes, I won’t own any more. Vortex dominates my safe and their diamondback Bino’s are better than my oculus at half the price.
Vortex customer service is second to none. You won’t be disappointed though 12x50 in any brand will be chunky compared to 10x42.