Arduino UNO Rev3 Vs UNO Wifi Rev2 ( The Difference Between Them)

I am a beginner.
Will I face any problem If I buy Arduino UNO WiFi Rev2 for my courses that use Arduni UNO Rev3 for the labs and projects in the courses?

many problems. buy both

It will depend on the specifics of the project. Stick with the UNO Rev 3 to be certain.