Which will be best to write in JEE Mains:- Paper 1 or Paper 2

There is no best paper as such.

JEE Main consists of two papers namely

1. Paper 1 for Btech Courses
2. Paper 2 for B.Arch/B.Planning Courses.

Both papers consist of 360 marks and has negative marking scheme as well.
The paper shall comprise weightage from Class 11 and Class 12  from PCM subjects.
Adhar card is mandatory for appearing Jee Mains.
Moreoevr, JEE .ajns shall be accepted into NITs, GFTIs, IIITs across India.

Paper 2 shall be for Architecture based colleges.

For complete details regarding paper pattern, Elegible criteria, form registration details scheck below.

https://engineering.careers360.com/exams/jee-main
All the very best.