For long runs and race day, In Pace is designed for distance. FreeLuxe feels weightless, with five pockets and bonded seams for comfort over distance. The In Pace Short 18cm gives you more coverage through the leg.
In Tempo uses CompressLuxe Eco for a firmer feel. It's designed for intervals, hybrid sessions and Hyrox. The In Tempo Run Short 14cm gives you a shorter fitted length.
The 10cm (4 inch) length gives you less coverage through the thigh. The 14cm is 5.5 inches, while 18cm is 7 inches. If thigh friction bothers you over distance, the longer length may suit you better.