It depends on your use, you say you develop and so you likely have a number of tools that you rely on for your day to day productivity. While the new Arm processor may well be faster then the Intel it is going to cause incompatibilities for a while.

Going the Intel route now will give you a stable machine which still has a lot of performance (depending on what exactly you develop, web great, Linux kernel not so much ;o)

Getting the first Arm will lead to you spending time dealing with first adopter bugs and learning new tooling due to your existing stack having incompatibilities.