Hi 1 post man !
Listens and absorbs
You will lose your time to convert MTA to samp and the result will be bad, convert to samp = downgrade , for example you can't convert the markers (people from samp think they are lights objects ha ha ha ha !)
you cant use the MTA add-on tool for the editor that output lua scripts. For your issue you cant have the full control on your custom objects in samp, so all this mean ... chose the right side, chose the simple side, chose the side that is the best, make your maps in the MTA map editor and use them for MTA and say bye bye to all the converting problems.
Remember :
MTA (everything lol) to samp = downgrade
samp to MTA = upgrade
MTA to MTA = OK
I'm 99% sure you will never answer and you will stay a 1 post man in this forum, but I hope you understand correctly the difference between the two MP mods, amen !