There's no difference, except for the need to guide the disc between the disc pads on reinstallation. The brake stays on the bike, and the disc comes off with the wheel.

Note that disc clearance is narrow, so you may get some rubbing if you don't mount the wheel in the original position. I always finalize any wheel install by opening the QR with the bike vertical on the ground, letting gravity settle the bike's dropouts fully onto the axle. Gravity is a very reliable force, and I've come to trust it more than trying to center by feel or eye.

BTW- on hydraulic brakes it's important not to squeeze the brake lever with the wheel off because this moves the pads too far out. The rule doesn't apply to mechanical brakes, but you might as well develop good habits now.