Help needed choosing a tablet

Hi! I don't understand anything about tablets but I saw these two models and was indecisive about which one to choose.

I want a tablet mostly to read pdfs, light and cheaper.

The tablets are:

• Tablet Lenovo Tab Plus TB351F - 256GB
• Galaxy Tab A9+ 128 GB

I also have this link comparing them but I don't have much knowledge about tablet specs:

https://www.gsmarena.com/compare.php3?idPhone1=13164&idPhone2=12617

Thank you for the help!