college stamp also required on LOR even though it is printed on college letter head??

University suggestions for MSCS Fall 2022

Gre: 330 ( 170 quant, 160 verbal, 3 awa) Cgpa: 7 Ielts : 7 Work experience: 10 months as software developer in infosys

Which one is better option UIC MIS VS University of Houston -Main Campus, MIS

If anyone can help me with deciding which one is the better option. As I had applied through UIC global my admission is

Do Professional LOR’s require any stamp from the company?

Do we need to get the lor sealed / stamped or is it not required and can we submit a pdf?

Has anybody got an admit from ASU for Spring'22 and is considering it?

Would love to connect and discuss on future tasks.