As I had experience with both GMAT and GRE, I can offer some advice if you are to switch from GMAT and GRE.
(1) I think you can get almost perfect Quant score in GRE.
(2) There is no SC in GRE. There are just 2 CR questions out of 40 in GRE Verbal. But GRE and GMAT do share RC questions and, generally speaking, GRE's reading is more challenging.
(3) GRE verbal also contains Sentence Completion & Sentence Equivalence questions, and they can get tough.
(4) It is almost always recommended to improve your GRE vocabulary. For GMAT, many test takers can do without dedicated vocab training.
So, GRE is not necessarily easier than GMAT. You can take an official GRE mock to see if you are better suited for GRE or not.