Just to note: the GT forward controls do have a few position adjustments up front (basically an inch or so each way), but the bike can also be converted to the R mid controls as well with a conversion kit - you'll find extension rods etc under the RHS panel.
I bought the R sight unseen based on reviews (and there were hardly any demo bikes around in late 2020) plus I wanted a red one as they are faster. 
I then added GT backrest and screen, round sport mirrors, heated grips, BT module, rear rack (since removed), rim tape, black badges etc etc. Oh, and now lots of carbon. The GT screen actually helped smooth the airflow for me (at 5'10") at... ahem... "highway speeds", but others have said it does nothing for them, so YMMV:
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