Zelda's score will depend if they fixed some of the tech problems of Link's Awakening. If they did not I expect a high 80 score, If they did I think it will be in the 90's. Reviewers like new gameplay ideas and Zelda usually delivers well on those. I expect Zelda to be a 5-6 million seller in the first 6 months.
The critical reception of Astrobot will depend if the game is just a bigger version of the PS5 pack-in or if it will provide new gameplay ideas. If it's just a bigger version of what is known I think it will be in the 80's. If it provides sufficient new gameplay ideas it will be in the 90's. Sales expectations are hard. We know from Sony's own reporting that Gaas games are the most played in several regions, next to established franchises like EA sport games, call of duty, etc. Still though, I estimate that Astrobot will sell 4-5 million in the first 6 months, also due to a lack of other first party Sony games.
So critical reception is a coin toss, but I give it to Zelda in that it looks more innovative at first what critics like. Sales wise Zelda wins due to the install base and that the game is more in line with 'typical Nintendo' Switch owners preferences.