Power output comparisons are especially difficult for induction systems, but the MX5200 datasheet says it puts 80 watts into two channels simultaneously. The Hakko FX-100 datasheet says it puts 50 watts into one channel. The FX-100 has some kind of temperature boost setting, which gives it a little more functionality compared to the Metcal. However, it also has Hakko's well-known awkward and overcomplicated button interface (as on the FX-951, FR-810, FM-206...) which many operators will want to throw at the wall.
Its 40Wx2 or 80Wx1.
The difference between 40 or 50W and 80W is not much, unless you are working with high thermal demand applications. General soldering will be using <20W.
I ordered one FX-100 and will see how it compares to the MX5200. Wondering about the Quick 202D model as its super cheap but don't think its true induction soldering iron.
Quick202D uses true induction, but its 400kHz so not directly compatible with the 13MHz Fx100/mx5200.
Also the heater coil is not in the tip, its in the handle. Similar to the budget tips on the latest Metcal stations, which are also 400kHz.
Clone Hakko tips are incredibly cheap, $10/ea. Metcal tips are about $20/ea.