After looking at the schematics, I think the instruction timings will be different for some instructions on kc compact and aleste.
It seems they don't apply wait states for i/o like the cpc does.
So, the I/O instructions will take less time (in one kc compact document it says all OUT (C),r and OUT (n),A, take the same time. 3 'nop' cycles. On the CPC OUT (C),r takes 4 nop cycles. It seems the OUTI instructions are also effected.)