A set of bevel gear is designed to have a speed ratio of $4.$ One set of bevel gears has a module of $2\mathrm{.}5$ and the other is $5.$ Pinion for both bevel gears have the same pitch diameter. And the driven gear for both bevel gears also have the same pitch diameter. What is much suitable for higher torque application, the one with a module of $2\mathrm{.}5$ or $5?$