Does the R9 M390 vs. M380 make any difference for a non-gamer?

Hi guys,

my mom wants to buy an iMac (and finally switch from a Windows PC) and asked me for my opinion. She told me her favourite so far is the 27 inch 3.2 GHz with 1TB fusion drive.

I think the version with the hard drive is fine too if she has the fusion drive added. It would end up being almost the same, except for the AMD Radeon R9 M380 instead of the R9 M390. She'd save $100. She's not a gamer and won't be doing any heavy duty graphics work. She has mainly documents and some photos to work with. Again, not in a professional way. Is there any noticeable difference between the two graphics cards on such a scale?