Uh, no. A mech will produce at most 4.1-4.2 volts, which will decline with the battery's state-of-charge. Hence a mech provides a considerably different vape on a freshly charged battery than on a battery that's in need of being re-charged. Moreover, a mech gives one zero ability to adjust voltage or power to suit whatever topper one might desire to use at the moment. A mech and a Provari are not at all comparable, and to say that a mech will "perform just as well" is bunk. Of course, there are loads (sub-ohm) that a mech can drive, which a Provari can't, but the opposite is also true -- try a 3.2 ohm carto on a mech and tell me how well it works on a mech, especially when that mech's battery is getting close to needing some charge.
An MVP is certainly more comparable. But to say that it performs "Just as well" is hyperbole. An MVP can only produce 3.3-5 volts, 3 amps, and 11 watts. A Provaru can produce 2.9-6V (a considerably wider range), 3.5 Amps, and around 15 watts. Yes, the MVP has other desirable features such as on-board charging, variable wattage, and a better user interface. I won't argue that the MVP is a tremendous value, but in the end, "performance" is about what comes out of the 510 connector and a Provari beats the MVP handily in that respect.
Note: I don't own a Provari and probably never will. I prefer DNA devices. But don't I suffer misinformation well.