I don't think anyone can compete with Mig, I don't recall seeing him compete in any AMPS/IPMS contests. However if he does, they are more than likely in Spain or somewhere close to his home so I have nothing to worry about.
;D
On a serious note though, what Scott said, don't even try.
It's one thing to respect and look in awe and hope to emulate his techniques but don't be disappointed if you try to compare your work to his. In any hobby, their are always people who will be more experienced than you and they should make you want to immerse yourself deeper into the hobby, not give it up.
Mig isn't a competitive
modeler by nature from any of my personal dealings with him, in fact just the opposite. In my experience he is one of the nicest and most sharing/giving modelers around. Anytime myself or any of my peers have asked him questions or advice he is always been extremely helpful and forthcoming and supportive. He has a true love and passion for the hobby that not all modelers have.
Lastly, while Mig is definitely among my top five favorite armor modelers there are some other names you might want to look up as well, they can be found on some designated armor sites, in many magazines and/or their own personal blogs. Along with Mig those names are, in no particular order Michael Rinaldi, Rick Lawler, Radek Pituch, Per Olav Lund.
Entering each of those names into google should bring you to their blogs or other images of their work. Be prepared to see even more incredible work.