There's nothing in the Tom's Hardware article about a hybrid CPU config or Zen5c cores, so this Wccftech rumor is not just a retread of the Tom's Hardware article and the Tom's article provides very little support for the Wccftech rumor.
"According to Olrak29, the Strix Point APU is expected to feature four Zen5 cores and eight Zen5c cores. On the other hand, the larger APU variant, known as Strix Halo or Sarlak, is said to boast 16 Zen5 cores divided into two chiplets, similar to the desktop version. The primary difference between desktop and ‘ultimate APU’ variant lies in the IO die, which houses the GPU, claims another leaker. The desktop processor will have a less capable GPU, while the Halo variant is rumored to incorporate up to 40 Compute Units, as suggested by earlier reports."