I don't have v2, so I can't tell you which one is best. Plus, it depends on what you prefer as a sound signature and what you have as a sound chain (sound card, DAC, amplifier...). Personally, I really like both my v1. I did end up buying the Objective 2 and the SMSL Idea, and the internal pads, so I do have a bit invested in this.
But just buying the headset and the pads already makes these quite nice. Gaming on these is one hell of an experience too.
For music, it depends on your hardware. These were amazing by themselves on my Xiaomi Redmi Note 3 Pro with its software improvements. On my Honor 9 they're OK, but I do miss the RN3P improvements. However, if I just add the DAC on it, it makes it better, so...
Never had an issue on my PC though, but I did have a motherboard with a creative chip, so...
But above all, chosing the right sources (good audio files, good youtube videos, high quality on spotify...) makes also quite the difference.
I'd recommend these for anyone wanting an upgrade for gaming, or from lower end headsets definitely. If you want a pair of cans that can hide bad audio mixing/quality, then these are not a good choice. If you are willing to work with them though... Then they become really good.