Comparing 2 objects and retrieve a list of fields with different values

Given a class with 35 fields and 2 objects with a certain number of different fields value. Is there an clever way to get a list<String> with the fields name where the object are as following?

e.g.

obj1.Name = "aaa";
obj1.LastName = "bbb";
obj1.Address = "xcs";
obj2.Name = "aaa";
obj2.LastName = "ccc";
obj2.Address = "jk";

objective:

list<<String>String> containing 2 Strings LastName and Address

I see reflection as the way to go but with 35 fields I am afraid it's too heavy. Any other idea, like linq?