Hmm, it's a bit confusing to be honest, depending on what context they mean.
On Dzudzuana pre-print Basal Eurasian is rather closer to Crown Eurasian which a common parent component split from ANA.
I visualize Basal Eurasians to look rather smaller in stature and more petite, a precursor to Proto-Mediterranean race. While ANA was the opposite, Taforalt/Iberomarusian/Kiffian and Paleolithic Egyptian skeletons are extremely robust and tall. Average Taforalt male height 15k years ago was 178cm with some of them reaching 2m height.
This dude is in Egyptian museum, he is a Paleolithic Egyptian, i suppose his Y-DNA was either E-M35 or downstream E-M78 and he was atleast 70% ANA.
Compare them with Iberomaurusians/Taforalt cranium.
Natufian crania full with Basal Eurasian looks different, more refined, petite.