1. a leopard is as dangerous as a tiger
2. Star Wars is a bit more interesting than Back to Future
3. Ben Nevis (1343 m) is not as high as Elbrus (5642 m)
4. the Ob (5410 km) is much longer than the Thames (338 km)
5. England (130,000 sq km) is larger than Wales (21,000 sq km)