Will stitching a number of .dng files be treated as one

The files are .raf and so I'll have to convert to dng for photoshop cc2015. I wondered whether stitching them first and then recovering some foreground detail would be easier as opposed to dealing with each image separately? I have previously only shot .jpgs but am led to believe I'll get better results shooting and using raw files for this. Camera is a Fuji XT2.
 
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