Don't know much about the loaded, but I do have an MC Operator which some say is just a loaded model with a rail and a paint job. Mine has been absolutely flawless and feeds everything. Fit, finish, accuracy, are all excellent. It is never getting sold and I have never had an ounce of buyer's remorse.
Some discredit it because the forgings are from Imbel which is a Brazilian manufacturer. I have heard that the Operator models with the NM prefix are fitted, and go through final QC, here in the USA, but the lower (less expensive) models are entirely Brazilian. That said, I don't hear a whole lot of complaints about Springfield and their customer service is second to none. Even if you get a lemon, they will make it right on their dollar, forever.
You might wanna do a search or check out the Springfield sub forum before some asshole comes along and disparages you for asking questions. Happens to me all the time.