As a fellow Honor 9 owner, I thought the same. I keep thinking I should replace my phone, but it does everything I want and more and still works perfectly. The RealMe looks tempting so I ran them both through GSMArena:
Short version, the RealMe has a bigger screen and better battery, but the pixel density of the screen is lower than the Honor (428ppi to 399ppi). Also the RealMe has a better camera cluster. The only other difficult comparison is the processor because the Honor uses Huawei's Kirin chipset. I found a website which claims to be able to compare the two:
Kirin 960 vs Snapdragon 765 - On paper, the Kirin looks faster. I think I'll keep the Honor!
Biting the hand that feeds IT
