Thay said PIC is industrial and less noisy ... In most of issue AVR is better

assuming this means "internally generated noise"
there is two issues
1) noise sensitivity of the controller
2) pickup in other components of the noise generated by the controller

ad 1) this can be "studied" by comparing Vih min and Vil max of the various controllers, if some AVR, PIC AND '51 user want to publish the comparison, please do.

ad 2) the best way to limit this is to use a controller with an internal PLL, run it a a low external clock multiplied internally to what is needed.

assuming this means "pickup of externally generated noise"
the actual uC has less than 1% influence of the result, 99% of the noise resistance comes from design and layout. I do not know how many BS posts we have seen "I need superb noise resistance, but do not want to use a 4 layer board".

Erik