Mark Messier by about 100x.
He's a consensus top 15 centre all time. 6 Cups. Conn Smythe. 2 Hart Trophies. 5x end of year All Star. Arguably top 10 playoff performer all time.
Matthews has 0 cups, Smythes. Might win his first Hart this year. Will be his second end of year All Star nod.
Messier by a very wide margin.
I've always found Mark Messier is one of the least talented greatest players ever.
Ask me to rank "greatest players of all-time" and he probably ranks around 20th or so.
Ask me to rank most skilled/talented players of all-time - and he's probably closer to 100th.
This actually isn't meant to be an insult, but a compliment. I've always found what he accomplished is really great, because he did it while having nowhere near the skills of Gretzky, Lemieux or others closer to his rank like Jagr, Esposito, etc.
So if the question was who is more skilled/talented - not so sure you couldn't rationalize an answer of Matthews.
Will Matthews ever come close to matching Messier's career? Well no, that's where I'd agree with your answer.