This mcu is exactly like XA-G49.
I doubt it. While many processors are "equivalent" the ONE thing that almost always differ is programming method. e.g. both Philips and Atmel make a 89C51RD2 and they are identical, but can not be programmed the same way.
I suggest you get a hold of an actual g49 and then make that work, then, if you have to, yoy can insert your other brand and see it fail.
Erik