Are the same type of antennas used for receiving and transmitting?
Antennae are mostly symmetric in their receive and transmit behaviour, i.e. they will have the same gain and frequency response in each role.

The main place where the symmetry breaks down is power handling: an antenna designed for receiving needs to carry only a tiny quantity of power whereas a transmitting antenna, e.g. for a large radar or a long-range communication link, might be carrying kilowatts or even megawatts of instantaneous power.

Power is not an issue for garage door opener radios though ;)  However, I would not necessarily expect that replacing the existing wire-antennae with these new antennas will yield any improvement.  They may do, or they may be worse depending on how well their impedance is matched to radio circuits you're using them with; have a google for VSWR.  The relationship between the antenna you use and any ground plane below is probably more important than changing one cheap piece of wire for another slightly-less-cheap bit.

By all means experiment with those, but don't have high hopes for longer range.