Help on correct frame size

Hi guys,

I come from mountainbiking and am about to buy my first gravel bike for both short speedy rides as well as longer backpacking trips.

With a height of 187.5cm and 86.3cm I am in between the L and XL frame for the brandnew Cube Nuroad C62 Race according to Cube‘s Website.

I was able to testride the XL (pictured) and the staff told me it fits fine. However, I felt very stretched on it. Can anyone tell from the image if this is how you are supposed to sit on a gravelbike? Is this streched feeling normal? Or does the reach look too long?

Unfortunately I was not able to test the L as it is not in yet. However I managed to ride the previous season‘s L and it felt more comfortable even though the saddle was obviously much higher above the handlebar. But the salesmen kept saying due to my long torso they would recommend the XL. They were not really enthusiastic about it though.

The L is only marginally shorter (-1.5cm) but the stack is like 2.5cm lower.

Any input would be appreciated. I bought a wrong frame size once on a commuter bike and would like to avoid such a mistake again.

Thanks!