The Sony a7C II refreshes the compact full-frame with a 33MP sensor, the addition of a front control dial, a dedicated 'AI' processor, 10-bit 4K/60p video and more. It's a definite improvement, but it helps if you value its compact form.
A Traveler's Review: The Sony a7C Camera
Sony Alpha 7C R Review
Sony a7C2 (ILCE-A7CM2) Review
Sony a7C II review: small camera, little compromise: Digital Photography Review
Sony a7CR Review
Sony a7C II review: small camera, little compromise: Digital Photography Review
Sony A7C review: Smarter, smaller and clumsier
Sony a7C II Review
Sony a7C initial review: Compact size, big sensor image quality : r/ photography
Sony Alpha A7C Review
Sony Alpha A7C II full review - Amateur Photographer
A honest A7C hands-on experience review from a Fuji fanboy – Alwin Kok
Sony a7C2 (ILCE-A7CM2) Review
Sony A7C II review: Minor updates on the outside, big improvements inside