Hi all - longtime reader, first time poster!

Will be flying between Buenos Aires and Mendoza in early December. Having read this board going a ways back, it seems that both LATAM and AR have mixed feedback.

Any thoughts/red flags/things I haven't considered with my initial plan?

AEP to MDZ - Dec 2 - LATAM 7644, 9:10 - 11:05am
We have no plans in Mendoza upon arrival other than checking into the hotel, so not too anxious about this one

MDZ to EZE - Dec 7 - AR 2423, 3:30 - 5:05pm
We will be flying back to the US that same evening, on UA 978 that departs to IAH at 9pm. Will ~4 hours should be enough given we will be flying into EZE not AEP? The other options would get us in by late morning, which seems too early... but of course, don't want to risk missing the flight back to the US! What would you recommend?

Thanks in advance!
-Jennifer