This stuff seems to come around every few months.
The 460 is the better way to make cheap power.
Cheap power also come with awkward packaging in older platforms and a non-vintage "vibe".
Going from an FE to a 460 requires headers, transmission, and a host of other minor modifications to get a working combination.
If you have none of those parts yet anyways, that cost would not be a factor.
I grew up with FEs, so the 460s cosmetics don't appeal to me as much.
The prettiest girl in the bar is worth chasing even if her plain friend is an easier target.....
If you wish to use the EMC as a comparator, I have entered numerous years with the FE, under a wide variety of rules. As long as cubic inches are limited/factored, and race style heads are not permitted - the FE platform does really well. I always finished even with or ahead of most of the 429/460 entries (other than Kaase - who is usually in another zip code). Blair flat out won. But in the "real world" cubic inches and various aftermarket heads are readily available, and the 460 will win out.