Only depends if you are using a 6-channel receiver (6100, 6200). Then you need to use gear. If you have a 7-channel receiver (7000) it doesn't matter.
I prefer not to use the gyro sense menu and use endpoints instead to set the gain. For one, that way I have a switch (in my case the gear switch) to flip the gyro from rate to HH mode. Second, you don't have to do that odd 1.44 math with endpoints. If you are using endpoints, endpoint of 50 is 50 gain. If you use gyro sense, to get a gain of 50, you need to set it at 72% (50 x 1.44 = 72). The only real reason I could see for using the gyro sense menu is that it lets you set different HH gains for different flight modes. So if for some reason, you wanted different HH gains in normal, idle1, and idle2, you need to use the gyro sense menu.
To use endpoints, just set the channel to itself in the menu (i.e. instead of setting gear to gyro, just set gear to gear).
There are plenty of people that prefer the gyro sense menu though. This is just my opinion.
450 se v2