Indeed the skull does have characteristics of both. Hence my post.
If you compared the skull of sahelanthropus to the skull of say, a tyrannosaurus rex, if someone asked you which was more similar to a human skull, you would have no trouble answering. Obviously sahelanthropus's skull shares some qualities with that of modern man. Two eyes in front, somewhat flat face (though not fully flat), teeth in a C shape, similar arrangement of teeth, foramen magnum almost fully below the skull, similar shaped skull etc.
Sahelanthropus indeed shares many qualities with modern man.
Simultaneously, it is different. You pointed out the larger canine teeth. It has a brain capacity about 1/4 the size of modern man. It does have a bit of a sloped nose. It has an abnormally large brow ridge. These are traits that are more ape like, like chimps or orangutans. Though the teeth arent as big as an orangutans. The foramen magnum is further beneath the skull than an orangutans. The angle between the foramen magnum and the orbital plane is closer to that of a human than a chimp.
So, sahelanthropus is not human, and it is not like any other ape around today. But indeed it does share qualities of both.
And understanding this, and saying "ok I understand this and I accept this", is step number one.
This is simply one piece of the puzzle, step one of the puzzle, it is one link in the chain, and one evidence of many. But it all starts here. With understanding the simple reality that these skulls, like that of sahel anthropus, does indeed have similarities with human beings and other apes.
Nobody expects anyone to just accept biological evolution on this alone. But this, in combination with other well understood facts, makes biological evolution a clear reality.