which one is better for a first-generation lawyer, in terms of corporate placements

If you can afford JGLS, I believe it is a better law school than SLS-P. The infrastructure, such as the hostel, food, classrooms, sports, and student societies, are all pretty good.

SLSP.

In terms of placements, SLSP will be ahead because of their much better alum base. In most other metrics, JGLS will fare better.

the placement cell in SLSP is not good. Very biased, very sus. Their screening process for internship for top firms is very weird. Don't trust people hyping up SLSP placements.

SLS. Because placement outcomes will always be the deciding metric.