Can I use the same .config file to compile 32-bit and 64-bit kernel?

[Hao Lee]

Hi,

I'm currently configuring a custom kernel on Fedora x86_64. The first
option on the configuration menu is "64-bit kernel" which I think is
the only option controlling the architecture of kernel. Copying this
.config file to a 32-bit system directly and turning off this option,
can I compile a 32-bit kernel which doesn't have any hidden problems?
If this way is feasible, I think the only difference between these two
kernels is architecture.

Regards,
Hao Lee