Would you buy the SL6 Comp version (black random weave pieces of carbon) in Di2 for $3800 or the SL7 Expert (silver to dark fade) for $5000?

I love the look of the newer bikes without the cables showing but there are really on 3 differences between these two bikes

1. Hidden Cables
2. SL6 has 9r carbon SL7 has 10r (likely won't notice any difference)
3. bottom brackets (pretty sure both are threaded, but the SL7 is newer version?)
4. Updated "Aero" shape of SL7

I wonder if I am being stupid to consider getting the Expert for $1200 more primarily because of the hidden cables.

I was thinking I could just get the aerofly II bars for the 6 (250-300) and just "deal with" the cables exposed. Eventually, if I wanted I could potentially upgrade to a SL7/8 frame later on.

Di2 for 3800 is a real bargain for the SL6. I do like the color of the black, and I also like the color of the silver.

*I have aero wheels, so those don't need to be included. I have Aeolous 50s

Thoughts?