Yes moabs are stronger. forged not cast.
Are mamba's strong? No idea, but not broken one yet and i don't rock crawl. Have done Gravel, trails, snow banks, ice roads, and standard array of pot holes you drive into.
Would i rather have moabs? yes. Good luck finding them in Canada for reasonable cash.
Will the mambas self destruct? no.
Are they identical to size to moabs? Maybe 1 mm different in offset, maybe... Somewhere its says 5.08 on some other place i looked, obviously not with a carpenters tape / bit of wood measurement. Is definitely not 4.5 inches. If anything the net displacement of the wheel is inward compared to moabs.



yes those are 245 75 16 on an 8 inch rim.