Nope. best western tank is Leo-2, Vhallenger is junk.
During testing for Oman army, Challenger-2 just broke. they couldnt find how the sans are getting into engine. And than they got is. sand isnt just sand... Onanian (rabian peninsula) sand is much smaller and gout with ease trough filter. Challenger-2 was testen in Africa and african sand is larger.
Second M-1 hade sucess just in combat with undertrain Iraqi T-55 and T-72s, and in condition of overvelming air superiority.
Leo-2 is theoretically good, but untested. Sand ingress problems with the Challenger were quickly fixed and during Gulf War 2 it had the highest reliability rating. It's British 'chobham' armor is stronger that the British 'chobham' armor we fit to M1's. Challenger holds the record for longest kill by a tank at 5100 meters with a conventional APFSDS 'Charm' DU round fired in the Gulf at a T55.
When I lived in England we regularly liased with US and British units operating M1's and CH2 in Germany. They were evenly matched and impressed our M1 boys with their superb off-road comfort at speed. The only CH2 ever destroyed was done so by friendly fire from another CH2. Junk my ass.
And they fixed the problem.
Next.
When the Russians work up the balls to square up on us...then we'll see how quickly they'll also get trounced. As for now...we fight the dumbies who do stand up. Not our fault.
And your supposition about the Leopard is just that, supposition.