No, I'm saying they are
most similar based on primarily genetic evidence, but also quantifiable morphological evidence. These are the most reliable forms of evidence as they are considerably less open to subjective interpretation than other forms of evidence. There is considerable discontinuity between the prehistoric sub-Saharan population in the region and sub-Saharan components in the region which are part of the genome today. For example,
Arredi et al 2004 didn't discover a single individual with Y-haplogroup A in his sampling of modern southern Egyptians which was predominate in the Neolithic Nubian remains tested by
Yousef et al 2009. The current sub-Saharan elements in Egyptians arrived primarily since late antiquity according to IBD length and are only about half from neighboring sub-Saharan populations, the rest of their sub-Saharan ancestry is from populations more distant including West Africa. Multiple studies have come to this conclusion.
While Muslim Egyptians show some evidence of very low level European admixture presumably from Greek and Roman times, the Copts of Khartoum do not. So your speculation there is unfounded. In fact, the Southern Egyptians who you claim look just like the ancient Egyptians actually have six times as much recent Middle Eastern ancestry as the Copts from of Khartoum ~73% versus only ~12% in the Copts. This is only set off by the ~15-20% sub-Saharan ancestry which is usually 2% or less in the few Copts that have any. The funny thing is you appear to not be able to subjectively tell the difference between sub-Saharan admixed Egyptians and Beja despite the two only having about 20% of their ancestry in common as far as the last ~20,000 years goes, and this subjective impression is precisely how you're making your assessments.
At K=4, Beja and Copts are about 70% phylogenetically identical, whereas sub-Saharan admixed Egyptians and Copts are only about 20% identical (Arabs here are Arabized Nubians):
But I guess in your subjective view all brown and dark brown people look the same?
In summary:
Copts and Beja share about 70% of their ancestry from the last ~20,000 years, but...
Southern Egyptians and Beja share only about 20% of their ancestry from the last ~20,000 years
So if you're claiming ancient Egyptians were most like Southern Egyptians and Beja, two populations who don't share that much in common genetically, then clearly your subjective assessments leave much to be desired.