My take is that these are the same Kh-55 that Ukraine sold them, except with a new paint job.
Things to note:
- These missiles do in fact have a range of 2500km
- It is very possible that Iran has reverse engineered them in the 14 years it has possessed them. Anything is possible in 14 years.
- Kh-55 is originally an air-launched missile, but the test was of ground launch. That raises a few questions.
The most important thing is that these missiles were actually made for nuclear weapons delivery, if that's not the job they are performing, they are not very useful except in mass numbers because they have poor accuracy. If Iran does produce them in mass numbers then it will be deploying them as tactical missiles, which raises another question. Remember that Russia does have tactical versions of Kh-55. But that missile is a significant upgrade over Kh-55. I doubt Iran has achieved that level of technological prowess.
This missile is too big and unmaneuverable to be a good tactical missile. The most useful utility of these will be as over glorified Scuds.
But, if Iran does develop nuclear weapons, then these missiles will alter the geopolitical situation. Without nuclear warheads these are just toothless tigers.
I doubt it has better capabilities compared to original Kh-55. Remember Iran is like clouds that thunder but do not rain. That said reverse engineering a kh-55 is also a big feat.