tomlee59 has already commented on this in your thread

http://68kmla.org/forums/viewtopic.php?t=2183

The increasing sophistication of manufacture with lapse of time ought to make the fan-provided 68000 Macs such as the Classic a better bet, but that guess does not include any examination of component quality changes.

In the end, nothing is likely to be more conclusive than your trying these possibilities for yourself, and publishing your results in these Forums.

de