It's a hybrid, not a mountain bike. It has 700c wheels.
You could do a lot worse for touring and general riding, but the quality is not as good.
The Galaxy is made of Reynolds 531st tubing which was designed specifically for touring bikes, although more recent models have been made in Reynolds 853 which is stronger and lighter again. It's as light as you can make a frame that can cope with touring loads, it has braze ons for racks front and rear, and the geometry is for stability at high speeds while loaded up with luggage and comfort for tired, distance riders. Your bike is probably made of plain guage high-tensile steel, which is heavier.
The wheels are stronger, made with tougher, eyeletted rims and cassette hubs. Yours will be most likely to have a freewheel hub, which is a weaker technology.
Yours is OK! People have gone around the world with less. But a Galaxy is a stronger, better designed and faster machine that will need fewer repairs and be more efficient, hence it justifies its price.