oversize for board racer and cafe racer?

[Rightright]

Hi everyone, this is my first post here.

I'm interested in Aero Leathers Cafe Racer and Board Racer jackets.
I think Cafe Racer has a more relaxed fit, while Board Racer is a slim fit

As far as I understand, even if you compare the same size in both jackets, the Cafe Racer has more room in the chest, shoulders, and arms than the Board Racer, is this right?

I'm aiming for a layered look and would like to wear clothes underneath these jackets.
Is it realistically possible to layer under either Cafe Racer or Board Racer?

Anyway I have a Board Racer that fits like a shirt and I really like this style. I'd love to keep wearing this kind of jackets even when the weather gets colder.

Any thoughts or advice would be much appreciated. Thanks in advance!

 

[Rightright]

Your explanation really helped me understand the difference between the two jackets. I also watched that Youtube you mentioned. It was very helpful. Thank you