Based on your photo, I think you could benefit from both an upper blepharoplasty and brow repositioning, although if I had to choose only one, I would probably lean toward the upper blepharoplasty. You do have some brow asymmetry, with greater brow ptosis on the right contributing to the heavier appearance of that upper eyelid. An upper blepharoplasty would more directly address the excess skin and improve upper eyelid definition on both sides. A temporal browlift could further improve the lateral hooding and asymmetry, particularly on the right, but I would consider that complementary rather than necessarily a substitute for the blepharoplasty. An in-person examination with the forehead completely relaxed is important to determine how much of the heaviness is coming from the brow versus the eyelid itself. And yes, either procedure can be performed at a later date. However, if you choose to have the upper blepharoplasty first, it should be performed conservatively, particularly when some of the apparent excess skin is related to brow ptosis. Removing too much upper eyelid skin can make a future browlift more difficult as the risk of not being able to close your eye may be increased.