Nothing wrong with ultegra di2. Weren't u informed before placing order?
I'm using SRAM Red 1st model. Used for so many years but hasn't malfunctioned. As for SRAM Rival, my friends have been complaining it being too heavy, and thus regretted the purchase. If you are already spending so much on a bike especially an SL8, you probably want to avoid disappointment with a less than desired groupset. You put Rival, people assume your expensive bike frame is a fake.
sram batteries can interchange front and rear derailleur but not ultegra.
SRAM completely wireless.
SRAM can take out small battery to charge but ultegra must charge bike at power socket
SRAM small and cute battery but ultegra so big battery
sl8 pro gloss silver and matte blue are ultegra di2.
They finding a sl8 pro sram force which is gloss or matte black colour for my size.
sl8 expert gloss grey and gloss black is sram rival.
I saw a Sworks matte white sram red etap axs but I really not sure if I should go all the way out cos this my first road bike and I lazy to clean bike.
all these bikes (groupset and colour) are as they are and I not yet considered building a bike.
if build a bike I only can consider gloss white frameset for my size.
Will prefer gloss just spray water and wipe down compared to matte.
But I already deposit for new bike and I not in hurry to get it. I just don’t want buyers remorse.