Run don't walk, $500 more for the Comp, (it's on sale, $1000 off, as of date of this post) you get Di2 and hydraulic futureshock, vs spring loaded. Now having said that, My 105, what a great entry level bike. Don't know how they did it, but the rear feels more compliant than my 2021 Diverge comp. The 105 is adequate and shifts nicely, not as smoothly as the GRX, Ultegra grade drivetrain on the Diverge Comp under load on inclines. On flats, difference isn't so much.(Keeping the Diverge. Here's my flame, who decided single speed is better, so glad I have the 2 speed GRX on the Diverge, I know off topic.) Ok, the ride was compliant as it arrived, moved the carbon Terra C's from the Diverge to the Roubaix, paved expansion joints, 50% less harshness, the Eaton Sl70 bars , a bit better, but not exponentially better than stock, prefer the Hover. The cockpit and slack are remarkably similar to the Diverge, the biggest departure is the rear chainstay, it's about 20mm shorter on the Roubaix.