Technically, to some extent, all Kang variants are comparable. They all discovered the multiverse around the same time, suggesting similar scientific progress. In Quantumania, the entire Council of Kangs is shown with comparable armor and technology (such as the teleportation). The only notable difference is that He Who Remains (HWR) discovered Alioth and used it to end the war. I don’t see why HWR wouldn’t be capable of using the same technology as the other versions of himself, considering that, up until the multiversal war, they all shared the same level of technological advancement.
Then again, I could be saying a bunch of nonsense, but this is how I see it.