Well the Leopard 1 is an older tank made back in 1965. The Canadian government however uses the Leopard 1 as a secondary weapon and as a reserve tank. It still is a powerful tank in city warfare, because the Leopard 1 main armament doesn't have the range of it's modern descendant, it still can give a powerful punch in the close range warfare. Here are the stats for the Leopard 1.
Weight: 42.2 tonnes (on latter models increased from 40.0 tonnes on the original)[1]
Length: 9.54/8.29 m (gun forward/rearward)
Width: 3.37 m
Height: 2.39/2.70 m (turret roof/absolute)
Crew: 4 (commander, driver, gunner, radio operator/loader)
Armor: RHA, 70 mm (maximum), 10mm (minimum)
Primary armament: 1 x 105mm Royal Ordnance L7A3 L/52 rifled gun
13 Round in Turret 42 Round in chassis
Secondary armament: 2 x 7.62 mm MG 3 (co-axial and commander's hatch)
5500 rounds
Engine: MTU MB 838 CaM 500, 10-cylinder, 37.4 litres, multi-fuel engine
830 PS (819 hp, 610 kW) at 2200 RPM
Power/weight: 19.6 PS/tonne Suspension Torsion-bar
Operational range: 600 km (on road), 450 km (cross-country)
Speed: 65 km/h
Now the Leopard 2 is a powerful MBT and has replaced the Leopard 1 in that role. It's gun is stronger so the range is farther. The Leopard 2 is faster and smaller than the more cumbersome Leopard 1. The Leopard 2 unlike some of it's counterparts, can survive an explosive device. There were a few incidents during the South Continental Wars where Leopard 2s would hit IEDs and instead of explode, the tanks would continue on. The crew were never hurt. Here are the stats of the Leopard 2.
Weight: 62.3 tonnes
Length: 7.7 m
Width: 3.7 m [1]
Height: 3.0 m
Crew: 4 [1]
Armor: 3rd Generation composite; including high-hardness steel, tungsten and plastic filler with ceramic component.
Primary armament: 1 x 120 mm Rheinmetall L55 smoothbore gun.[1]
42 rounds
Secondary armament: 2 x 7.62 mm MG3 [1]
4,750 rounds
Engine: MTU MB 873 Ka-501 12-cylinder diesel
1,500 HP(1,103 kW)at 2600 RPM.
Power/weight: 24.2 hp/tonne Suspension torsion-bar
Operational range: 550 km (internal fuel) [1]
Speed: 72 km/h [1]