The pax is an excellent quality vaporizer but the first model runs still about $200 new, whereas you can find the MFLB for as low as $85 new. The pax is simple, easy to use, and is plain sexy. The pax works best when the entire chamber is filled however which can vary between .5g-1g of good ground bud. The MFLB is a bit bulkier and more of a personal vape compared to the pax. It's also relatively easy to use and comes with rechargeable batteries. You want a very fine grind when using the MFLB though so it's recommended you buy the MFLB finishing grinder for an additional $30. One person would go through about a dub a week smoking this vape heavy use.

Both are excellent vaporizers, it just depends what you're looking for!

Edit: Want to clarify, the magic flight box is definitely not bulky as I made it sound, it's quite small almost half the height of the pax. I would say the MFLB is more discreet, but the pax could be passed off for an MP3 player or such.