Furnace relay - old one says 18 LRA, replacement says 48 LRA - Does it matter?
The LRA is simply the maximum amperage the relay is rated for when starting up a motor. Having a higher LRA just means you have a higher rated relay for starting currents. Having more will not matter.
The FLA or full load amperage is the rated operating amperage which in your case is the same as the original.

In many cases it's easier to just make a higher rated relay and use it for many different applications.