@quantum_tea
Like I said, the webcomic hasn't been fully translated to English yet, so I can't really answer that, maybe 50%, I think. So if you can read Japanese, you can check out the the webcomic.
But you need to be aware that the manga makes some changes to the order of the chapters, meaning that some of the chapters of the webcomic were adapted first even though they were released later (for example, chap 120 of Horimiya is a combination of parts of chap 145, 206, 207, and 208 in the webcomic), so it can be a pain in the butt to keep track on the story when you read both version.
For me, I'd wait for the Horimiya release. It's more fun to wait to be surprised, and to have a discussion on an ongoing manga.