WD3200JS or WD3200AAJS

WD Internal Drives Desktop & Mobile Drives
1

I need to replace the WD3200JS harddrive in my computer.  Will a WD3200AAJS be a good replacement.  Can someone tell me what the difference is or if I should find the exact harddrive taken out of the computer to avoid problems when reinstalling.   Thanks so much,  Maggie