MOD is not made by MT. i think the old MOD owner might have worked for MT, something like that, but they arent the same company, blackhawk owns MOD now.
of the 2 knives ya listed, iw ould get neither, i have never been crazy about MOD unless ya can get a deal on one from an individual, too high $$ for the quality imho. i would rather (much rather actually) have a BM skirmish than any MOD folder, better steel/design/lock/price, though the MODs are servicable knives, i think BM is better, as is MT/EKI/etc, just better stuff around imho. for the money........
of all the emerson knives, the mach is one of my least favs, not waved, nothing neat about it really imho, get a SOCFK, or a persian tactical (P-Tac) or a CQC8 or even a CQC7, all of them much nicer imho than a mach, never really liked the mach, spec war myself. all of them are good knives, just imho there are better ones, your first emerson should be waved.
now i dont hate MOD/etc, they are perfectly good functional knives, if thats what grabs ya, go for it, MOD simply isnt my cup of tea, but thats why theres chocolate and vanilla i suppose........