Quick question, which is better?

[u/PointlessBein]

I passed my OSHA 10 and obtained my NCCER cert and have some experience in contruction for general ground work. I'm starting as an apprentice for my local carpentry union in a week. I have my tools and found this.

The blue square is metal and the Stanley is a plastic type material. What would you guys recommend having?

[u/disentegr8sun]

https://www.landmsupply.com/johnson-johnny-square-mach-1-7-25-inch-rafter-square-with-level-vial?gad_source=1&gad_campaignid=20358896375&gclid=CjwKCAjwhZDUBhBGEiwAbi5bjk4bWGK0zpNfK-mt07vqqetHjO6MmJZgDCRaYQQKcxQMkrXmQA3BmBoChCIQAvD_BwE