Quick SA trip — Buenos Aires & Santiago, is this enough time for each city??

I’m considering an extended weekend trip to Argentina and Chile for Memorial Day weekend, but am uncertain about how many days to allocate for the cities I’m going to.

I only have 5 full days for this and was thinking 3 for Buenos Aires and 2.5 for Santiago? Or should I do 4 days BA and 1.5 Santiago?

This is a solo trip and I’d be limiting myself to just those cities, no day trips or exploring other parts of the country. I only care to see the main tourist sites, eat good food, and maybe partake in some nightlife. I’m not super into museums or spending a whole day to just to see one thing. Fast paced traveler here, lol!

Again, I know it’s a short trip and respectfully, I’m not looking for the “that’s not nearly enough time, you need 3 weeks in just one city” lecture. I just want to know if the time I have for each city is enough to scratch the surface and see the main sites or should I divide the days up differently?

Thank you in advance!

UPDATE: I’ve decided to spend all 5 days in BA. Thank you!