Both are really good options. Olmesartan and Telmisartan are in the same class (ARBs), so they both do a great job with blood pressure, kidney protection, and cardiovascular risk.
Olmesartan might have a slight edge in pure BP lowering for some people, while telmisartan has a small benefit metabolically (insulin sensitivity and such), but nothing major for most.
From a kidney and heart protection standpoint, they’re basically equivalent. The bigger factor is just how well your BP is controlled and how you respond to it.
not really about one being “better,” more about what works best for the individual as both are quite good.