The Mini Manix sports probably the best heavy usage utility folder for the money...but it will never be a Sebenza. Only a Sebenza will ever be a Sebenza as it is in a class of its own.
The lock strength on the two are comparable (likely even favors the Manix)...but with heavy usage, blade play develops on any folder except the Sebenza. Benchmade has stolen and used Reeve's lock, but they have not been able to do it successfully as of yet as their 'frame locks' are temperamental to say the least.
The Sebenza can be disassembled by anyone and reassembled and keep the exact same tolerances every time. The tang locks up in the same position, the clip is amazingly strong, the entire knife is amazingly light, blade play does not exist, fit and finish are simply excellent. The blade geometry of the Sebenza makes it an amazing slicer with the extreme hollow grind...it does not do well at cutting metal and heavy material however. The serrations on the Sebenza aren't bad, but they are nowhere near as effective as the SpyderEdge. The Manix is a heavy cutter as for sh&ts and giggles I have sliced up soup cans because it can without damaging the edge much at all. The knife is also good for hacking. The G10 on the Manix is grippier and some find the Manix more ergonomic...I honestly think they both are.
Both sport CPM-S30V steel which I will swear to the bone this is the best cutlery steel conceived to date. The Sebenza is the ideal EDC companion...the Manix is the ideal heavy user if you have to chop, deep cut, hack, baton, etc. Subsequently, I often carry both! (and yes, I carry the dreaded CE)
WARNING: Sanity not guaranteed.