I have both of the needle valves, the Clippard and the Swagelok.

The Clippard will work just fine but it's a little touchy.
For me the Swagelok was worth the extra cost because you can make such fine adjustments.

In fact I'm now using both of them, the Swagelok going to my reactor and the Clippard going to my CO2 mist.

But if I was to have just one if would be the Swagelok.

Bill